Shivkumar, Kalyanam

Titles

Director, UCLA Cardiac Arrhythmia Center

Professor, Medicine

Radiology

Contact Information

Email

kshivkumar@mednet.ucla.edu

Phone

Work Phone Number: (310) 206-2235
(310) 206-6433

Address

Mailing Address:

Office Address
100 UCLA Medical Plaza
Suite # 660
Los Angeles, CA 90095
UNITED STATES

UCLA Cardiac Arrhythmia Center
100 UCLA Medical Plaza

Los Angeles, CA 90095
UNITED STATES

Work Address:

Clinic Address
100 UCLA Medical Plaza, suite 6300
Suite # 690
Los Angeles, CA 90095
UNITED STATES

Website

http://www.uclahealth.org/KalyanamShivkumar
http://arrhythmia.ucla.edu/
http://research.arrhythmia.ucla.edu/team

Biography

Dr. Shivkumar received his medical degree from the University of Madras, India in 1991 and his PhD from UCLA in 2000. He completed his cardiology fellowship training at the University of California, Los Angeles, and upon completion of his training joined the faculty at University of Iowa, where he also served as the Associate Director of Cardiac Electrophysiology. In 2002, he was recruited back to UCLA to direct the newly created UCLA Cardiac Arrhythmia Center at the David Geffen School of Medicine at UCLA. His field of specialization is interventional cardiac electrophysiology and he heads a group at UCLA that is involved in developing innovative techniques for the non-pharmacological management of cardiac arrhythmias. He is Professor of Medicine and holds a joint appointment as Professor of Radiology in the Department of Radiology at UCLA. He also serves as the Director & Chief of Cardiovascular Interventional Programs at UCLA. Dr. Shivkumar is certified by the American Board of Internal Medicine in the subspecialties of Cardiovascular Disease and Clinical Cardiac Electrophysiology. He holds memberships in several professional organizations, including the American Heart Association, American College of Cardiology and the Heart Rhythm Society. He has been elected to the membership of the American Society of Clinical Investigation (ASCI) and serves as the institutional representative of UCLA for the ASCI. He was elected as an honorary Fellow of the Royal College of Physicians (London) in 2016.

Research Interests

Catheter Ablation of Cardiac Arrhythmias, Autonomic Regulation of Myocardial Excitability

-Mechanisms of Arrhythmias -Role of autonomic nervous system in the regulation of myocardial excitability -Mapping electrical integration and safety of emerging novel small molecule and biological therapeutic agents for heart disease

Publications

A selected list of publications:

Buckley, U.; Rajendran, P. S.; Shivkumar, K. Ganglionated plexus ablation for atrial fibrillation: Just because we can, does that mean we should? Heart Rhythm, 2017; 14(1): 133-134.

Hamon, D.; Blaye-Felice, M. S.; Bradfield, J. S.; Chaachoui, N.; Tung, R.; Elayi, C. S.; Vaseghi, M.; Dhanjal, T. S.; Boyle, N. G.; Maury, P.; Shivkumar, K.; Lellouche, N. A New Combined Parameter to Predict Premature Ventricular Complexes Induced Cardiomyopathy: Impact and Recognition of Epicardial Origin J Cardiovasc Electrophysiol, 2016; 27(6): 709-17.

Weiss, J. N.; Qu, Z.; Shivkumar, K. Ablating atrial fibrillation: A translational science perspective for clinicians Heart Rhythm, 2016; 13(9): 1868-77.

Saenz, L. C.; Corrales, F. M.; Bautista, W.; Traina, M.; Meymandi, S.; Rodriguez, D. A.; Tellez, L. J.; Vaseghi, M.; Garcia, F.; Shivkumar, K.; Bradfield, J. S. Cardiac sympathetic denervation for intractable ventricular arrhythmias in Chagas disease Heart Rhythm, 2016; 13(7): 1388-94.

Pokorney, S. D.; Friedman, D. J.; Calkins, H.; Callans, D. J.; Daoud, E. G.; Della-Bella, P.; Jackson, K. P.; Shivkumar, K.; Saba, S.; Sapp, J.; Stevenson, W. G.; Al-Khatib, S. M. Catheter ablation of ventricular tachycardia: Lessons learned from past clinical trials and implications for future clinical trials Heart Rhythm, 2016; 13(8): 1748-54.

Zhang, P.; Tung, R.; Zhang, Z.; Sheng, X.; Liu, Q.; Jiang, R.; Sun, Y.; Chen, S.; Yu, L.; Ye, Y.; Fu, G.; Shivkumar, K.; Jiang, C. Characterization of the epicardial substrate for catheter ablation of Brugada syndrome Heart Rhythm, 2016; 13(11): 2151-2158.

Tung, R.; Josephson, M. E.; Bradfield, J. S.; Shivkumar, K. Directional Influences of Ventricular Activation on Myocardial Scar Characterization: Voltage Mapping With Multiple Wavefronts During Ventricular Tachycardia Ablation Circ Arrhythm Electrophysiol, 2016; 9(8): .

Buch, E.; Share, M.; Tung, R.; Benharash, P.; Sharma, P.; Koneru, J.; Mandapati, R.; Ellenbogen, K. A.; Shivkumar, K. Long-term clinical outcomes of focal impulse and rotor modulation for treatment of atrial fibrillation: A multicenter experience Heart Rhythm, 2016; 13(3): 636-41.

Shivkumar, K. MY APPROACH to selecting patients for videoscopic cardiac sympathetic denervation (CSD) Trends Cardiovasc Med, 2016; 26(8): 735-736.

Rashid, S.; Rapacchi, S.; Shivkumar, K.; Plotnik, A.; Finn, J. P.; Hu, P. Modified wideband three-dimensional late gadolinium enhancement MRI for patients with implantable cardiac devices Magn Reson Med, 2016; 75(2): 572-84.

Ajijola, O. A.; Shivkumar, K.; Habecker, B. A. Natriuretic peptides and peripheral autonomic neurotransmission: back to the A, B, and C's Cardiovasc Res, 2016; 112(3): 619-621.

Macias, C.; Shivkumar, K.; Tung, R. Novel approach to intraprocedural cardiac tamponade: Dual-site drainage with continuous suction Heart Rhythm, 2016; 13(10): 2091-4.

Nakamura, K.; Ajijola, O. A.; Aliotta, E.; Armour, J. A.; Ardell, J. L.; Shivkumar, K. Pathological effects of chronic myocardial infarction on peripheral neurons mediating cardiac neurotransmission Auton Neurosci, 2016; 197: 34-40.

Siontis, K. C.; Kim, H. M.; Stevenson, W. G.; Fujii, A.; Bella, P. D.; Vergara, P.; Shivkumar, K.; Tung, R.; Do, D. H.; Daoud, E. G.; Okabe, T.; Zeppenfeld, K.; Riva Silva, M.; Hindricks, G.; Arya, A.; Weber, A.; Kuck, K. H.; Metzner, A.; Mathew, S.; Riedl, J.; Yokokawa, M.; Jongnarangsin, K.; Latchamsetty, R.; Morady, F.; Bogun, F. M. Prognostic Impact of the Timing of Recurrence of Infarct-Related Ventricular Tachycardia After Catheter Ablation Circ Arrhythm Electrophysiol, 2016; 9(12): .

Te Riele, A. S.; Ajijola, O. A.; Shivkumar, K.; Tandri, H. Role of Bilateral Sympathectomy in the Treatment of Refractory Ventricular Arrhythmias in Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy Circ Arrhythm Electrophysiol, 2016; 9(4): e003713.

Tung, R.; Kim, S.; Yagishita, D.; Vaseghi, M.; Ennis, D. B.; Ouadah, S.; Ajijola, O. A.; Bradfield, J. S.; Mahapatra, S.; Finn, P.; Shivkumar, K. Scar voltage threshold determination using ex vivo magnetic resonance imaging integration in a porcine infarct model: Influence of interelectrode distances and three-dimensional spatial effects of scar Heart Rhythm, 2016; 13(10): 1993-2002.

Buckley, U.; Shivkumar, K. Stress-induced cardiac arrhythmias: The heart-brain interaction Trends Cardiovasc Med, 2016; 26(1): 78-80.

Buckley, U.; Yamakawa, K.; Takamiya, T.; Andrew Armour, J.; Shivkumar, K.; Ardell, J. L. Targeted stellate decentralization: Implications for sympathetic control of ventricular electrophysiology Heart Rhythm, 2016; 13(1): 282-8.

Rao, H. B.; Yu, R.; Chitnis, N.; Do, D.; Boyle, N. G.; Shivkumar, K.; Bradfield, J. S. Ventricular Tachycardia Ablation in the Presence of Left Ventricular Thrombus: Safety and Efficacy J Cardiovasc Electrophysiol, 2016; 27(4): 453-9.

Ajijola, O. A.; Howard-Quijano, K.; Scovotti, J.; Vaseghi, M.; Lee, C.; Mahajan, A.; Shivkumar, K. Augmentation of cardiac sympathetic tone by percutaneous low-level stellate ganglion stimulation in humans: a feasibility study Physiol Rep, 2015; 3(3): .

Buckley, U.; Shivkumar, K.; Ardell, J. L. Autonomic Regulation Therapy in Heart Failure Curr Heart Fail Rep, 2015; 12(4): 284-93.

Mao, J.; Moriarty, J. M.; Mandapati, R.; Boyle, N. G.; Shivkumar, K.; Vaseghi, M. Catheter ablation of accessory pathways near the coronary sinus: value of defining coronary arterial anatomy Heart Rhythm, 2015; 12(3): 508-14.

Yu, R.; Ma, S.; Tung, R.; Stevens, S.; Macias, C.; Bradfield, J.; Buch, E.; Vaseghi, M.; Fujimura, O.; Gornbein, J.; Mandapati, R.; Shivkumar, K.; Boyle, N. G. Catheter ablation of scar-based ventricular tachycardia: Relationship of procedure duration to outcomes and hospital mortality Heart Rhythm, 2015; 12(1): 86-94.

Ajijola, O. A.; Boyle, N. G.; Shivkumar, K. Detecting and monitoring arrhythmia recurrence following catheter ablation of atrial fibrillation Front Physiol, 2015; 6: 90.

Huang, W. A.; Shivkumar, K.; Vaseghi, M. Device-based autonomic modulation in arrhythmia patients: the role of vagal nerve stimulation Curr Treat Options Cardiovasc Med, 2015; 17(5): 379.

Tung, R.; Shivkumar, K. Epicardial Ablation of Ventricular Tachycardia Methodist Debakey Cardiovasc J, 2015; 11(2): 129-34.

Tung, R.; Vaseghi, M.; Frankel, D. S.; Vergara, P.; Di Biase, L.; Nagashima, K.; Yu, R.; Vangala, S.; Tseng, C. H.; Choi, E. K.; Khurshid, S.; Patel, M.; Mathuria, N.; Nakahara, S.; Tzou, W. S.; Sauer, W. H.; Vakil, K.; Tedrow, U.; Burkhardt, J. D.; Tholakanahalli, V. N.; Saliaris, A.; Dickfeld, T.; Weiss, J. P.; Bunch, T. J.; Reddy, M.; Kanmanthareddy, A.; Callans, D. J.; Lakkireddy, D.; Natale, A.; Marchlinski, F.; Stevenson, W. G.; Della Bella, P.; Shivkumar, K. Freedom from recurrent ventricular tachycardia after catheter ablation is associated with improved survival in patients with structural heart disease: An International VT Ablation Center Collaborative Group study Heart Rhythm, 2015; 12(9): 1997-2007.

Ajijola, O. A.; Romero, J.; Vorobiof, G.; Suh, W. M.; Shivkumar, K.; Tung, R. Hyper-response to cardiac resynchronization with permanent His bundle pacing: Is parahisian pacing sufficient? HeartRhythm Case Rep, 2015; 1(6): 429-433.

Tung, R.; Bauer, B.; Schelbert, H.; Lynch, J. P., 3rd; Auerbach, M.; Gupta, P.; Schiepers, C.; Chan, S.; Ferris, J.; Barrio, M.; Ajijola, O.; Bradfield, J.; Shivkumar, K. Incidence of abnormal positron emission tomography in patients with unexplained cardiomyopathy and ventricular arrhythmias: The potential role of occult inflammation in arrhythmogenesis Heart Rhythm, 2015; 12(12): 2488-98.

Vakil, K. P.; Roukoz, H.; Tung, R.; Levy, W. C.; Anand, I. S.; Shivkumar, K.; Rector, T. S.; Vaseghi, M.; Tholakanahalli, V. Mortality prediction using a modified Seattle Heart Failure Model may improve patient selection for ventricular tachycardia ablation Am Heart J, 2015; 170(6): 1099-104.

Tung, R.; Shivkumar, K. Neuraxial modulation for treatment of VT storm J Biomed Res, 2015; 29(1): 56-60.

Benharash, P.; Buch, E.; Frank, P.; Share, M.; Tung, R.; Shivkumar, K.; Mandapati, R. Quantitative analysis of localized sources identified by focal impulse and rotor modulation mapping in atrial fibrillation Circ Arrhythm Electrophysiol, 2015; 8(3): 554-61.

Irie, T.; Yu, R.; Bradfield, J. S.; Vaseghi, M.; Buch, E. F.; Ajijola, O.; Macias, C.; Fujimura, O.; Mandapati, R.; Boyle, N. G.; Shivkumar, K.; Tung, R. Relationship between sinus rhythm late activation zones and critical sites for scar-related ventricular tachycardia: systematic analysis of isochronal late activation mapping Circ Arrhythm Electrophysiol, 2015; 8(2): 390-9.

Ajijola, O. A.; Yagishita, D.; Reddy, N. K.; Yamakawa, K.; Vaseghi, M.; Downs, A. M.; Hoover, D. B.; Ardell, J. L.; Shivkumar, K. Remodeling of stellate ganglion neurons after spatially targeted myocardial infarction: Neuropeptide and morphologic changes Heart Rhythm, 2015; 12(5): 1027-35.

Mao, J.; Moriarty, J. M.; Mandapati, R.; Boyle, N. G.; Shivkumar, K.; Vaseghi, M. Reply to the Editor-More Awarenessless Risk-Interpretation of Ablation Risk Caused by Coronary Arterial Anatomy Heart Rhythm, 2015; 12(7): e66-7.

Buch, E.; Benharash, P.; Frank, P.; Share, M.; Tung, R.; Shivkumar, K.; Mandapati, R.; Mandapati, R. Response to Letter by Jalife et al Regarding Article, "Quantitative Analysis of Localized Sources Identified by Focal Impulse and Rotor Mapping in Atrial Fibrillation" Circ Arrhythm Electrophysiol, 2015; 8(5): 1299-300.

Yagishita, D.; Chui, R. W.; Yamakawa, K.; Rajendran, P. S.; Ajijola, O. A.; Nakamura, K.; So, E. L.; Mahajan, A.; Shivkumar, K.; Vaseghi, M. Sympathetic nerve stimulation, not circulating norepinephrine, modulates T-peak to T-end interval by increasing global dispersion of repolarization Circ Arrhythm Electrophysiol, 2015; 8(1): 174-85.

Yamakawa, K.; Rajendran, P. S.; Takamiya, T.; Yagishita, D.; So, E. L.; Mahajan, A.; Shivkumar, K.; Vaseghi, M. Vagal nerve stimulation activates vagal afferent fibers that reduce cardiac efferent parasympathetic effects Am J Physiol Heart Circ Physiol, 2015; 309(9): H1579-90.

Methangkool, E.; Chua, J. H.; Gopinath, A.; Shivkumar, K.; Mahajan, A. Anesthetic considerations for thoracoscopic sympathetic ganglionectomy to treat ventricular tachycardia storm: a single-center experience J Cardiothorac Vasc Anesth, 2014; 28(1): 69-75.

Hamon, D.; Taleski, J.; Vaseghi, M.; Shivkumar, K.; Boyle, N. G. Arrhythmias in the Heart Transplant Patient Arrhythm Electrophysiol Rev, 2014; 3(3): 149-55.

Bourke, T.; Buch, E.; Mathuria, N.; Michowitz, Y.; Yu, R.; Mandapati, R.; Shivkumar, K.; Tung, R. Biophysical parameters during radiofrequency catheter ablation of scar-mediated ventricular tachycardia: epicardial and endocardial applications via manual and magnetic navigation J Cardiovasc Electrophysiol, 2014; 25(11): 1165-73.

Lynch, J. P., 3rd; Hwang, J.; Bradfield, J.; Fishbein, M.; Shivkumar, K.; Tung, R. Cardiac involvement in sarcoidosis: evolving concepts in diagnosis and treatment Semin Respir Crit Care Med, 2014; 35(3): 372-90.

Bradfield, J. S.; Shivkumar, K. Cardiac resynchronization therapy-induced proarrhythmia: understanding preferential conduction within myocardial scars Circ Arrhythm Electrophysiol, 2014; 7(6): 1000-2.

Vaseghi, M.; Gima, J.; Kanaan, C.; Ajijola, O. A.; Marmureanu, A.; Mahajan, A.; Shivkumar, K. Cardiac sympathetic denervation in patients with refractory ventricular arrhythmias or electrical storm: intermediate and long-term follow-up Heart Rhythm, 2014; 11(3): 360-6.

Arshad, A.; Johnson, C. K.; Mittal, S.; Buch, E.; Hamam, I.; Tran, T.; Shaw, R. E.; Musat, D.; Preminger, M.; Sichrovsky, T.; Herweg, B.; Shivkumar, K.; Hummel, J.; Steinberg, J. S. Comparative safety of periablation anticoagulation strategies for atrial fibrillation: data from a large multicenter study Pacing Clin Electrophysiol, 2014; 37(6): 665-73.

Stevens, S. M.; Tung, R.; Rashid, S.; Gima, J.; Cote, S.; Pavez, G.; Khan, S.; Ennis, D. B.; Finn, J. P.; Boyle, N.; Shivkumar, K.; Hu, P. Device artifact reduction for magnetic resonance imaging of patients with implantable cardioverter-defibrillators and ventricular tachycardia: late gadolinium enhancement correlation with electroanatomic mapping Heart Rhythm, 2014; 11(2): 289-98.

Pedersen, C. T.; Kay, G. N.; Kalman, J.; Borggrefe, M.; Della-Bella, P.; Dickfeld, T.; Dorian, P.; Huikuri, H.; Kim, Y. H.; Knight, B.; Marchlinski, F.; Ross, D.; Sacher, F.; Sapp, J.; Shivkumar, K.; Soejima, K.; Tada, H.; Alexander, M. E.; Triedman, J. K.; Yamada, T.; Kirchhof, P.; Lip, G. Y.; Kuck, K. H.; Mont, L.; Haines, D.; Indik, J.; Dimarco, J.; Exner, D.; Iesaka, Y.; Savelieva, I.; Ep-Europace, U. K. EHRA/HRS/APHRS expert consensus on ventricular arrhythmias Heart Rhythm, 2014; 11(10): e166-96.

Pedersen, C. T.; Kay, G. N.; Kalman, J.; Borggrefe, M.; Della-Bella, P.; Dickfeld, T.; Dorian, P.; Huikuri, H.; Kim, Y. H.; Knight, B.; Marchlinski, F.; Ross, D.; Sacher, F.; Sapp, J.; Shivkumar, K.; Soejima, K.; Tada, H.; Alexander, M. E.; Triedman, J. K.; Yamada, T.; Kirchhof, P.; Document, Reviewers; Lip, G. Y.; Kuck, K. H.; Mont, L.; Haines, D.; Indik, J.; Dimarco, J.; Exner, D.; Iesaka, Y.; Savelieva, I. EHRA/HRS/APHRS expert consensus on ventricular arrhythmias Europace, 2014; 16(9): 1257-83.

Rashid, S.; Rapacchi, S.; Vaseghi, M.; Tung, R.; Shivkumar, K.; Finn, J. P.; Hu, P. Improved late gadolinium enhancement MR imaging for patients with implanted cardiac devices Radiology, 2014; 270(1): 269-74.

Miller, J. M.; Kowal, R. C.; Swarup, V.; Daubert, J. P.; Daoud, E. G.; Day, J. D.; Ellenbogen, K. A.; Hummel, J. D.; Baykaner, T.; Krummen, D. E.; Narayan, S. M.; Reddy, V. Y.; Shivkumar, K.; Steinberg, J. S.; Wheelan, K. R. Initial independent outcomes from focal impulse and rotor modulation ablation for atrial fibrillation: multicenter FIRM registry J Cardiovasc Electrophysiol, 2014; 25(9): 921-9.

Reddy, Y. M.; Chinitz, L.; Mansour, M.; Bunch, T. J.; Mahapatra, S.; Swarup, V.; Di Biase, L.; Bommana, S.; Atkins, D.; Tung, R.; Shivkumar, K.; Burkhardt, J. D.; Ruskin, J.; Natale, A.; Lakkireddy, D. Percutaneous left ventricular assist devices in ventricular tachycardia ablation: multicenter experience Circ Arrhythm Electrophysiol, 2014; 7(2): 244-50.

Angle, J. F.; Prince, E. A.; Matsumoto, A. H.; Lohmeier, T. E.; Roberts, A. M.; Misra, S.; Razavi, M. K.; Katholi, R. E.; Sarin, S. N.; Sica, D. A.; Shivkumar, K.; Ahrar, K. Proceedings from the Society of Interventional Radiology Foundation Research Consensus Panel on Renal Sympathetic Denervation J Vasc Interv Radiol, 2014; 25(4): 497-509.

Lakkireddy, D.; Kanmanthareddy, A.; Biria, M.; Madhu Reddy, Y.; Pillarisetti, J.; Mahapatra, S.; Berenbom, L.; Chinitz, L.; Atkins, D.; Bommana, S.; Tung, R.; D. I. Biase L; Shivkumar, K.; Natale, A. Radiofrequency ablation of drug refractory ventricular tachycardia related to cocaine use: a feasibility, safety, and efficacy study J Cardiovasc Electrophysiol, 2014; 25(7): 739-46.

Bradfield, J. S.; Vaseghi, M.; Shivkumar, K. Renal denervation for refractory ventricular arrhythmias Trends Cardiovasc Med, 2014; 24(5): 206-13.

Bradfield, J.; Woodbury, B.; Traina, M.; Hernandez, S.; Sanchez, D.; Wachsner, R.; Shivkumar, K.; Meymandi, S. Repolarization parameters are associated with mortality in chagas disease patients in the United States Indian Pacing Electrophysiol J, 2014; 14(4): 171-80.

Tung, R.; Mathuria, N. S.; Nagel, R.; Mandapati, R.; Buch, E. F.; Bradfield, J. S.; Vaseghi, M.; Boyle, N. G.; Shivkumar, K. Response to letter regarding "Impact of local ablation on inter-connected channels within ventricular scar: mechanistic implications for substrate modification" Circ Arrhythm Electrophysiol, 2014; 7(2): 363.

Bradfield, J.; Woodbury, B.; Traina, M.; Hernandez, S.; Sanchez, D.; Wachsner, R.; Shivkumar, K.; Meymandi, S. Response to letter to the editor regarding article "repolarization parameters are associated with mortality in chagas disease patients in the United States" Indian Pacing Electrophysiol J, 2014; 14(6): 311-2.

Remo, B. F.; Preminger, M.; Bradfield, J.; Mittal, S.; Boyle, N.; Gupta, A.; Shivkumar, K.; Steinberg, J. S.; Dickfeld, T. Safety and efficacy of renal denervation as a novel treatment of ventricular tachycardia storm in patients with cardiomyopathy Heart Rhythm, 2014; 11(4): 541-6.

Khalsa, S. S.; Shahabi, L.; Ajijola, O. A.; Bystritsky, A.; Naliboff, B. D.; Shivkumar, K. Synergistic application of cardiac sympathetic decentralization and comprehensive psychiatric treatment in the management of anxiety and electrical storm Front Integr Neurosci, 2014; 7: 98.

Tung, R.; Shivkumar, K. Unusual response to entrainment of ventricular tachycardia: in or out? Heart Rhythm, 2014; 11(4): 725-7.

Ajijola, O. A.; Tung, R.; Shivkumar, K. Ventricular tachycardia in ischemic heart disease substrates Indian Heart J, 2014; 66 Suppl 1: S24-34.

Tholakanahalli, V. N.; Bertog, S.; Roukoz, H.; Shivkumar, K. Catheter ablation of ventricular tachycardia using intracoronary wire mapping and coil embolization: description of a new technique Heart Rhythm, 2013; 10(2): 292-6.

Yagishita, D.; Ajijola, O. A.; Vaseghi, M.; Nsair, A.; Zhou, W.; Yamakawa, K.; Tung, R.; Mahajan, A.; Shivkumar, K. Electrical homogenization of ventricular scar by application of collagenase: a novel strategy for arrhythmia therapy Circ Arrhythm Electrophysiol, 2013; 6(4): 776-83.

Tung, R.; Michowitz, Y.; Yu, R.; Mathuria, N.; Vaseghi, M.; Buch, E.; Bradfield, J.; Fujimura, O.; Gima, J.; Discepolo, W.; Mandapati, R.; Shivkumar, K. Epicardial ablation of ventricular tachycardia: an institutional experience of safety and efficacy Heart Rhythm, 2013; 10(4): 490-8.

Tung, R.; Mathuria, N. S.; Nagel, R.; Mandapati, R.; Buch, E. F.; Bradfield, J. S.; Vaseghi, M.; Boyle, N. G.; Shivkumar, K. Impact of local ablation on interconnected channels within ventricular scar: mechanistic implications for substrate modification Circ Arrhythm Electrophysiol, 2013; 6(6): 1131-8.

Vaseghi, M.; Fujimura, O.; Shivkumar, K. Narrow QRS complex tachycardia: what is the mechanism? Heart Rhythm, 2013; 10(9): 1402-4.

Bradfield, J. S.; Tung, R.; Boyle, N. G.; Buch, E.; Shivkumar, K. Our approach to minimize risk of epicardial access: standard techniques with the addition of electroanatomic mapping guidance J Cardiovasc Electrophysiol, 2013; 24(6): 723-7.

Narayan, S. M.; Shivkumar, K.; Krummen, D. E.; Miller, J. M.; Rappel, W. J. Panoramic electrophysiological mapping but not electrogram morphology identifies stable sources for human atrial fibrillation: stable atrial fibrillation rotors and focal sources relate poorly to fractionated electrograms Circ Arrhythm Electrophysiol, 2013; 6(1): 58-67.

Vaseghi, M.; Macias, C.; Tung, R.; Shivkumar, K. Percutaneous interventricular septal access in a patient with aortic and mitral mechanical valves: a novel technique for catheter ablation of ventricular tachycardia Heart Rhythm, 2013; 10(7): 1069-73.

van Dam, P. M.; Tung, R.; Shivkumar, K.; Laks, M. Quantitative localization of premature ventricular contractions using myocardial activation ECGI from the standard 12-lead electrocardiogram J Electrocardiol, 2013; 46(6): 574-9.

Tung, R.; Shivkumar, K. The value of image integration for epicardial catheter ablation of ventricular tachycardia JACC Cardiovasc Imaging, 2013; 6(1): 53-5.

Bradfield, J. S.; Huang, W.; Tung, R.; Buch, E.; Okhovat, J. P.; Fujimura, O.; Boyle, N. G.; Gornbein, J.; Ellenbogen, K. A.; Shivkumar, K. Tissue voltage discordance during tachycardia versus sinus rhythm: implications for catheter ablation Heart Rhythm, 2013; 10(6): 800-4.

Bradfield, J. S.; Tung, R.; Shivkumar, K. Transmural "Scar-to-Scar" Reentrant Ventricular Tachycardia Indian Pacing Electrophysiol J, 2013; 13(6): 212-6.

Tung, R.; Shivkumar, K.; Mandapati, R. Ablation of Post Transplant Atrial Flutter and Pseudo-fibrillation Using Magnetic Navigation via a Superior Approach Indian Pacing Electrophysiol J, 2012; 12(5): 229-32.

Shivkumar, K.; Ellenbogen, K. A.; Hummel, J. D.; Miller, J. M.; Steinberg, J. S. Acute termination of human atrial fibrillation by identification and catheter ablation of localized rotors and sources: first multicenter experience of focal impulse and rotor modulation (FIRM) ablation J Cardiovasc Electrophysiol, 2012; 23(12): 1277-85.

Mathuria, N.; Tung, R.; Shivkumar, K. Advances in ablation of ventricular tachycardia in nonischemic cardiomyopathy Curr Cardiol Rep, 2012; 14(5): 577-83.

Kneller, J.; Shivkumar, K.; Tung, R. Assessment of His-Purkinje reserve: what is the mechanism of block? Heart Rhythm, 2012; 9(3): 465-6.

Bourke, T.; Moriarty, J.; Boyle, N. G.; Shivkumar, K. Atrial Fibrillation Ablation: Do We Really Need Preprocedural Imaging? Card Electrophysiol Clin, 2012; 4(3): 305-15.

Ajijola, O. A.; Vaseghi, M.; Mahajan, A.; Shivkumar, K. Bilateral cardiac sympathetic denervation: why, who and when? Expert Rev Cardiovasc Ther, 2012; 10(8): 947-9.

Bradfield, J.; Shapiro, S.; Finch, W.; Tung, R.; Boyle, N. G.; Buch, E.; Mathuria, N.; Mandapati, R.; Shivkumar, K.; Bersohn, M. Catheter ablation of typical atrial flutter in severe pulmonary hypertension J Cardiovasc Electrophysiol, 2012; 23(11): 1185-90.

Bradfield, J.; Tung, R.; Mandapati, R.; Boyle, N. G.; Shivkumar, K. Catheter ablation utilizing remote magnetic navigation: a review of applications and outcomes Pacing Clin Electrophysiol, 2012; 35(8): 1021-34.

Ajijola, O. A.; Wisco, J. J.; Lambert, H. W.; Mahajan, A.; Stark, E.; Fishbein, M. C.; Shivkumar, K. Extracardiac neural remodeling in humans with cardiomyopathy Circ Arrhythm Electrophysiol, 2012; 5(5): 1010-116.

Stephens, D. N.; Truong, U. T.; Nikoozadeh, A.; Oralkan, O.; Seo, C. H.; Cannata, J.; Dentinger, A.; Thomenius, K.; de la Rama, A.; Nguyen, T.; Lin, F.; Khuri-Yakub, P.; Mahajan, A.; Shivkumar, K.; O'Donnell, M.; Sahn, D. J. First in vivo use of a capacitive micromachined ultrasound transducer array-based imaging and ablation catheter J Ultrasound Med, 2012; 31(2): 247-56.

Tung, R.; Mathuria, N.; Michowitz, Y.; Yu, R.; Buch, E.; Bradfield, J.; Mandapati, R.; Wiener, I.; Boyle, N.; Shivkumar, K. Functional pace-mapping responses for identification of targets for catheter ablation of scar-mediated ventricular tachycardia Circ Arrhythm Electrophysiol, 2012; 5(2): 264-72.

Discepolo, W.; Buch, E.; Shivkumar, K. How to target postablation perimitral flutter: valve isthmus or PV triggers? J Cardiovasc Electrophysiol, 2012; 23(2): 145-6.

Bradfield, J. S.; Buch, E.; Shivkumar, K. Interventions to decrease the morbidity and mortality associated with implantable cardioverter-defibrillator shocks Curr Opin Crit Care, 2012; 18(5): 432-7.

Vaseghi, M.; Shivkumar, K. Neuraxial modulation for ventricular arrhythmias: a new hope Heart Rhythm, 2012; 9(11): 1888-9.

Mathuria, N.; Buch, E.; Shivkumar, K. Pleuropericardial fistula formation after prior epicardial catheter ablation for ventricular tachycardia Circ Arrhythm Electrophysiol, 2012; 5(1): e18-9.

Vaseghi, M.; Zhou, W.; Shi, J.; Ajijola, O. A.; Hadaya, J.; Shivkumar, K.; Mahajan, A. Sympathetic innervation of the anterior left ventricular wall by the right and left stellate ganglia Heart Rhythm, 2012; 9(8): 1303-9.

Di Biase, L.; Santangeli, P.; Bai, R.; Tung, R.; David Burkhardt, J.; Shivkumar, K.; Natale, A. The Emerging Role of Epicardial Ablation Card Electrophysiol Clin, 2012; 4(3): 425-37.

Bradfield, J.; Boyle, N. G.; Mandapati, R.; Shivkumar, K. The emerging role of cardiac resynchronization therapy in milder heart failure: are we implanting too late for response? Curr Heart Fail Rep, 2012; 9(1): 51-6.

Michowitz, Y.; Buch, E.; Bourke, T.; Tung, R.; Bradfield, J.; Mathuria, N.; Boyle, N. G.; Shivkumar, K. Unipolar and bipolar electrogram characteristics predict exit block during pulmonary vein antral isolation Pacing Clin Electrophysiol, 2012; 35(11): 1294-301.

Michowitz, Y.; Tung, R.; Athill, C.; Shivkumar, K. Ventricular tachycardia from remote blunt chest trauma: combined epicardial-endocardial right ventricular substrate characterization Pacing Clin Electrophysiol, 2012; 35(5): e127-30.

Michowitz, Y.; Mathuria, N.; Shivkumar, K.; Mandapati, R. Wide complex tachycardia with a unique mode of termination: what is the mechanism? Pacing Clin Electrophysiol, 2012; 35(1): 97-9.

Lee, W.; Griffin, W.; Wildes, D.; Buckley, D.; Topka, T.; Chodakauskas, T.; Langer, M.; Calisti, S.; Bergstol, S.; Malacrida, J. P.; Lanteri, F.; Maffre, J.; McDaniel, B.; Shivkumar, K.; Cummings, J.; Callans, D.; Silvestry, F.; Packer, D. A 10-Fr ultrasound catheter with integrated micromotor for 4-D intracardiac echocardiography IEEE Trans Ultrason Ferroelectr Freq Control, 2011; 58(7): 1478-91.

Ramirez, R. J.; Ajijola, O. A.; Zhou, W.; Holmstrom, B.; Luning, H.; Laks, M. M.; Shivkumar, K.; Mahajan, A. A new electrocardiographic marker for sympathetic nerve stimulation: modulation of repolarization by stimulation of stellate ganglia J Electrocardiol, 2011; 44(6): 694-9.

Bai, R.; Di Biase, L.; Shivkumar, K.; Mohanty, P.; Tung, R.; Santangeli, P.; Saenz, L. C.; Vacca, M.; Verma, A.; Khaykin, Y.; Mohanty, S.; Burkhardt, J. D.; Hongo, R.; Beheiry, S.; Dello Russo, A.; Casella, M.; Pelargonio, G.; Santarelli, P.; Sanchez, J.; Tondo, C.; Natale, A. Ablation of ventricular arrhythmias in arrhythmogenic right ventricular dysplasia/cardiomyopathy: arrhythmia-free survival after endo-epicardial substrate based mapping and ablation Circ Arrhythm Electrophysiol, 2011; 4(4): 478-85.

Tung, R.; Nakahara, S.; Ramirez, R.; Gui, D.; Magyar, C.; Lai, C.; Fishbein, M.; Shivkumar, K. Accuracy of combined endocardial and epicardial electroanatomic mapping of a reperfused porcine infarct model: a comparison of electrofield and magnetic systems with histopathologic correlation Heart Rhythm, 2011; 8(3): 439-47.

Bello, D.; Einhorn, A.; Kaushal, R.; Kenchaiah, S.; Raney, A.; Fieno, D.; Narula, J.; Goldberger, J.; Shivkumar, K.; Subacius, H.; Kadish, A. Cardiac magnetic resonance imaging: infarct size is an independent predictor of mortality in patients with coronary artery disease Magn Reson Imaging, 2011; 29(1): 50-6.

Nakahara, S.; Vaseghi, M.; Ramirez, R. J.; Fonseca, C. G.; Lai, C. K.; Finn, J. P.; Mahajan, A.; Boyle, N. G.; Shivkumar, K. Characterization of myocardial scars: electrophysiological imaging correlates in a porcine infarct model Heart Rhythm, 2011; 8(7): 1060-7.

Bradfield, J.; Mathuria, N.; Tung, R.; Shivkumar, K. Coronary sinus fistula: a reason not to implant a transvenous left ventricular lead Heart Rhythm, 2011; 8(10): 1658.

Michowitz, Y.; Lellouche, N.; Contractor, T.; Bourke, T.; Wiener, I.; Buch, E.; Boyle, N.; Bersohn, M.; Shivkumar, K. Defibrillation threshold testing fails to show clinical benefit during long-term follow-up of patients undergoing cardiac resynchronization therapy defibrillator implantation Europace, 2011; 13(5): 683-8.

Michowitz, Y.; Nakahara, S.; Bourke, T.; Buch, E.; Vaseghi, M.; De Diego, C.; Wiener, I.; Mahajan, A.; Shivkumar, K. Electrophysiological differences between the epicardium and the endocardium of the left atrium Pacing Clin Electrophysiol, 2011; 34(1): 37-46.

Bourke, T.; Mathuria, N.; Michowitz, Y.; Shivkumar, K. Hybrid techniques and neuraxial modulation for treatment of ventricular tachycardia Future Cardiol, 2011; 7(3): 273-6.

Shackley, B. S.; Nguyen, T. P.; Shivkumar, K.; Finn, P. J.; Fishbein, M. C. Idiopathic massive myocardial calcification: a case report and review of the literature Cardiovasc Pathol, 2011; 20(2): e79-83.

Bradfield, J.; Tung, R.; Boyle, N. G.; Shivkumar, K. Managing patients with ICD shocks and programming tachycardia therapies during acute heart failure syndromes Heart Fail Rev, 2011; 16(5): 449-56.

Lellouche, N.; De Diego, C.; Boyle, N. G.; Wiener, I.; Akopyan, G.; Child, J. S.; Shivkumar, K. Relationship between mechanical and electrical remodelling in patients with cardiac resynchronization implanted defibrillators Europace, 2011; 13(8): 1180-7.

Di Biase, L.; Al-Ahamad, A.; Santangeli, P.; Hsia, H. H.; Sanchez, J.; Bai, R.; Bailey, S.; Horton, R.; Gallinghouse, G. J.; Burkhardt, D. J.; Lakkireddy, D.; Yang, Y.; Badhwar, N.; Scheinman, M.; Tung, R.; Dello Russo, A.; Pelargonio, G.; Casella, M.; Tomassoni, G.; Shivkumar, K.; Natale, A. Safety and outcomes of cryoablation for ventricular tachyarrhythmias: results from a multicenter experience Heart Rhythm, 2011; 8(7): 968-74.

Mathuria, N. S.; Vaseghi, M.; Buch, E.; Shivkumar, K. Successful ablation of an epicardial ventricular tachycardia using a surgical ablation tool Circ Arrhythm Electrophysiol, 2011; 4(6): e84-6.

Seo, C. H.; Stephens, D. N.; Cannata, J.; Dentinger, A.; Lin, F.; Park, S.; Wildes, D.; Thomenius, K. E.; Chen, P.; Nguyen, T.; de La Rama, A.; Jeong, J. S.; Mahajan, A.; Shivkumar, K.; Nikoozadeh, A.; Oralkan, O.; Truong, U.; Sahn, D. J.; Khuri-Yakub, P. T.; O'Donnell, M. The feasibility of using thermal strain imaging to regulate energy delivery during intracardiac radio-frequency ablation IEEE Trans Ultrason Ferroelectr Freq Control, 2011; 58(7): 1406-17.

Bradfield, J.; Buch, E.; Shivkumar, K. Three dissociated rhythms after ablation of an atypical right atrial flutter J Cardiovasc Electrophysiol, 2011; 22(4): 477.

Tung, R.; Nakahara, S.; Maccabelli, G.; Buch, E.; Wiener, I.; Boyle, N. G.; Carbucicchio, C.; Bella, P. D.; Shivkumar, K. Ultra high-density multipolar mapping with double ventricular access: a novel technique for ablation of ventricular tachycardia J Cardiovasc Electrophysiol, 2011; 22(1): 49-56.

Aboulhosn, J.; Williams, R.; Shivkumar, K.; Barkowski, R.; Plunkett, M.; Miner, P.; Houser, L.; Laks, H.; Reemtsen, B.; Shannon, K.; Child, J. Arrhythmia recurrence in adult patients with single ventricle physiology following surgical Fontan conversion Congenit Heart Dis, 2010; 5(5): 430-4.

Vaseghi, M.; Shivkumar, K. Catheter ablation of idiopathic ventricular tachycardia Circ Arrhythm Electrophysiol, 2010; 3(3): 219-21.

Tung, R.; Nakahara, S.; Ramirez, R.; Lai, C.; Fishbein, M. C.; Shivkumar, K. Distinguishing epicardial fat from scar: analysis of electrograms using high-density electroanatomic mapping in a novel porcine infarct model Heart Rhythm, 2010; 7(3): 389-95.

Nakahara, S.; Tung, R.; Ramirez, R. J.; Gima, J.; Wiener, I.; Mahajan, A.; Boyle, N. G.; Shivkumar, K. Distribution of late potentials within infarct scars assessed by ultra high-density mapping Heart Rhythm, 2010; 7(12): 1817-24.

Michowitz, Y.; Mathuria, N.; Tung, R.; Esmailian, F.; Kwon, M.; Nakahara, S.; Bourke, T.; Boyle, N. G.; Mahajan, A.; Shivkumar, K. Hybrid procedures for epicardial catheter ablation of ventricular tachycardia: value of surgical access Heart Rhythm, 2010; 7(11): 1635-43.

Nakahara, S.; Ramirez, R. J.; Buch, E.; Michowitz, Y.; Vaseghi, M.; de Diego, C.; Boyle, N. G.; Mahajan, A.; Shivkumar, K. Intrapericardial balloon placement for prevention of collateral injury during catheter ablation of the left atrium in a porcine model Heart Rhythm, 2010; 7(1): 81-7.

Ho, J. K.; Nakahara, S.; Shivkumar, K.; Mahajan, A. Live three-dimensional transesophageal echocardiographic imaging of novel multielectrode ablation catheters Heart Rhythm, 2010; 7(4): 570-1.

Khuri-Yakub, B. T.; Oralkan, O.; Nikoozadeh, A.; Wygant, I. O.; Zhuang, S.; Gencel, M.; Choe, J. W.; Stephens, D. N.; de la Rama, A.; Chen, P.; Lin, F.; Dentinger, A.; Wildes, D.; Thomenius, K.; Shivkumar, K.; Mahajan, A.; Seo, C. H.; O'Donnell, M.; Truong, U.; Sahn, D. J. Miniaturized ultrasound imaging probes enabled by CMUT arrays with integrated frontend electronic circuits Conf Proc IEEE Eng Med Biol Soc, 2010; 2010: 5987-90.

Santangeli, P.; Di Biase, L.; Lakkireddy, D.; Burkhardt, J. D.; Pillarisetti, J.; Michowitz, Y.; Sanchez, J. E.; Horton, R.; Mohanty, P.; Gallinghouse, G. J.; Dello Russo, A.; Casella, M.; Pelargonio, G.; Santarelli, P.; Verma, A.; Narasimhan, C.; Shivkumar, K.; Natale, A. Radiofrequency catheter ablation of ventricular arrhythmias in patients with hypertrophic cardiomyopathy: safety and feasibility Heart Rhythm, 2010; 7(8): 1036-42.

Bradfield, J.; Buch, E.; Tung, R.; Shivkumar, K. Recurrent irregular tachycardia that consistently terminates on a P wave: what is the mechanism? J Cardiovasc Electrophysiol, 2010; 21(9): 1062-3.

Mandapati, R.; Shivkumar, K. The autonomic stress of sleep: Sleeping the sleep of death Heart Rhythm, 2010; 7(8): 1075-6.

Dave, A. S.; Aboulhosn, J.; Child, J. S.; Shivkumar, K. Transconduit puncture for catheter ablation of atrial tachycardia in a patient with extracardiac Fontan palliation Heart Rhythm, 2010; 7(3): 413-6.

Natale, A.; Raviele, A.; Al-Ahmad, A.; Alfieri, O.; Aliot, E.; Almendral, J.; Breithardt, G.; Brugada, J.; Calkins, H.; Callans, D.; Cappato, R.; Camm, J. A.; Della Bella, P.; Guiraudon, G. M.; Haissaguerre, M.; Hindricks, G.; Ho, S. Y.; Kuck, K. H.; Marchlinski, F.; Packer, D. L.; Prystowsky, E. N.; Reddy, V. Y.; Ruskin, J. N.; Scanavacca, M.; Shivkumar, K.; Soejima, K.; Stevenson, W. J.; Themistoclakis, S.; Verma, A.; Wilber, D.; Venice Chart, members Venice Chart International Consensus document on ventricular tachycardia/ventricular fibrillation ablation J Cardiovasc Electrophysiol, 2010; 21(3): 339-79.

Sahn, D. J.; Stephens, D. N.; Cannata, J. M.; Shung, K.; Oralkan, O.; Nikoozadeh, A.; Khuri-Yakub, B. T.; Nguyen, H.; Chen, P.; Dentinger, A. M.; Wildes, D.; Thomenius, K. E.; Mahajan, A.; Shivkumar, K.; O'Donnell, M. A family of intracardiac ultrasound imaging devices designed for guidance of electrophysiology ablation procedures Conf Proc IEEE Eng Med Biol Soc, 2009; 2009: 1913-7.

Buch, E.; Tung, R.; Shehata, M.; Shivkumar, K. Alternating cycle length during supraventricular tachycardia: what is the mechanism? J Cardiovasc Electrophysiol, 2009; 20(9): 1071-3.

Boyle, N. G.; Shivkumar, K. Atrial fibrillation in congestive heart failure: current management Cardiol Clin, 2009; 27(1): 79-93, viii-ix.

Schenke-Layland, K.; Stock, U. A.; Nsair, A.; Xie, J.; Angelis, E.; Fonseca, C. G.; Larbig, R.; Mahajan, A.; Shivkumar, K.; Fishbein, M. C.; MacLellan, W. R. Cardiomyopathy is associated with structural remodelling of heart valve extracellular matrix Eur Heart J, 2009; 30(18): 2254-65.

Cesario, D.; Kedia, R.; Desai, N.; Aboulhosn, J.; Uslan, D.; Boyle, N.; Fujimura, O.; Shehata, M.; Buch, E.; Shivkumar, K. Device extraction in adults with congenital heart disease Pacing Clin Electrophysiol, 2009; 32(3): 340-5.

Buch, E.; Nakahara, S.; Shivkumar, K. Diagnostic maneuver during narrow-complex tachycardia: what is the arrhythmia mechanism? Heart Rhythm, 2009; 6(5): 716-7.

Buch, E.; Shivkumar, K. Epicardial catheter ablation of atrial fibrillation Minerva Med, 2009; 100(2): 151-7.

Stephens, D. N.; O'Donnell, M.; Thomenius, K.; Dentinger, A.; Wildes, D.; Chen, P.; Shung, K. K.; Cannata, J.; Khuri-Yakub, P.; Oralkan, O.; Mahajan, A.; Shivkumar, K.; Sahn, D. J. Experimental studies with a 9F forward-looking intracardiac imaging and ablation catheter J Ultrasound Med, 2009; 28(2): 207-15.

Ho, J. K.; Liakopoulos, O. J.; Crowley, R.; Yezbick, A. B.; Sanchez, E.; Shivkumar, K.; Mahajan, A. In vivo detection of myocardial ischemia in pigs using visible light spectroscopy Anesth Analg, 2009; 108(4): 1185-92.

Vaseghi, M.; Lellouche, N.; Ritter, H.; Fonarow, G. C.; Patel, J. K.; Moriguchi, J.; Fishbein, M. C.; Kobashigawa, J. A.; Shivkumar, K. Mode and mechanisms of death after orthotopic heart transplantation Heart Rhythm, 2009; 6(4): 503-9.

Shivkumar, K.; Buch, E.; Boyle, N. G. Nonpharmacologic management of atrial fibrillation: role of the pulmonary veins and posterior left atrium Heart Rhythm, 2009; 6(12 Suppl): S5-S11.

Tung, R.; Shivkumar, K. Ripple mapping: making electroanatomic mapping user-friendly Heart Rhythm, 2009; 6(12): 1763-4.

Boyle, N. G.; Shivkumar, K. Atrial fibrillation and congestive heart failure Curr Heart Fail Rep, 2008; 5(1): 11-5.

Buch, E.; Shivkumar, K. Exploring the potential of pulmonary vein recordings: can they help elucidate mechanisms of paroxysmal atrial fibrillation? Europace, 2008; 10(6): 690-1.

Nikoozadeh, A.; Wygant, I. O.; Lin, D. S.; Oralkan, O.; Ergun, A. S.; Stephens, D. N.; Thomenius, K. E.; Dentinger, A. M.; Wildes, D.; Akopyan, G.; Shivkumar, K.; Mahajan, A.; Sahn, D. J.; Khuri-Yakub, B. T. Forward-looking intracardiac ultrasound imaging using a 1-D CMUT array integrated with custom front-end electronics IEEE Trans Ultrason Ferroelectr Freq Control, 2008; 55(12): 2651-60.

Mahajan, A.; Crowley, R.; Ho, J. K.; Sanchez, E.; Trivedi, P.; Natterson, B.; Shivkumar, K. Imaging the ascending aorta and aortic arch using transesophageal echocardiography: the expanded aortic view Echocardiography, 2008; 25(4): 408-13.

Buch, E.; Nakahara, S.; Shivkumar, K. Intra-pericardial balloon retraction of the left atrium: a novel method to prevent esophageal injury during catheter ablation Heart Rhythm, 2008; 5(10): 1473-5.

Ramirez, R. J.; Shivkumar, K. Latent atrial fibrillation triggers originating in accessory pathways Heart Rhythm, 2008; 5(9): 1248-9.

Stephens, D. N.; Cannata, J.; Liu, R.; Zhao, J. Z.; Shung, K. K.; Nguyen, H.; Chia, R.; Dentinger, A.; Wildes, D.; Thomenius, K. E.; Mahajan, A.; Shivkumar, K.; Kim, K.; O'Donnell, M.; Nikoozadeh, A.; Oralkan, O.; Khuri-Yakub, P. T.; Sahn, D. J. Multifunctional catheters combining intracardiac ultrasound imaging and electrophysiology sensing IEEE Trans Ultrason Ferroelectr Freq Control, 2008; 55(7): 1570-81.

Shivkumar, K. Percutaneous epicardial ablation of atrial fibrillation Heart Rhythm, 2008; 5(1): 152-4.

Stephens, D. N.; Cannata, J.; Liu, R.; Zhao, J. Z.; Shung, K. K.; Nguyen, H.; Chia, R.; Dentinger, A.; Wildes, D.; Thomenius, K. E.; Mahajan, A.; Shivkumar, K.; Kim, K.; O'Donnell, M.; Sahn, D. The acoustic lens design and in vivo use of a multifunctional catheter combining intracardiac ultrasound imaging and electrophysiology sensing IEEE Trans Ultrason Ferroelectr Freq Control, 2008; 55(3): 602-18.

Vaseghi, M.; Shivkumar, K. The role of the autonomic nervous system in sudden cardiac death Prog Cardiovasc Dis, 2008; 50(6): 404-19.

Buch, E.; Vaseghi, M.; Cesario, D. A.; Shivkumar, K. A novel method for preventing phrenic nerve injury during catheter ablation Heart Rhythm, 2007; 4(1): 95-8.

Lellouche, N.; De Diego, C.; Vaseghi, M.; Buch, E.; Cesario, D. A.; Mahajan, A.; Wiener, I.; Fonarow, G. C.; Boyle, N. G.; Shivkumar, K. Cardiac resynchronization therapy response is associated with shorter duration of atrial fibrillation Pacing Clin Electrophysiol, 2007; 30(11): 1363-8.

Lellouche, N.; De Diego, C.; Akopyan, G.; Boyle, N. G.; Mahajan, A.; Cesario, D. A.; Wiener, I.; Shivkumar, K. Changes and predictive value of dispersion of repolarization parameters for appropriate therapy in patients with biventricular implantable cardioverter-defibrillators Heart Rhythm, 2007; 4(10): 1274-83.

Li, X. K.; Pemberton, J.; Thomenius, K.; Dentinger, A.; Lowe, R. I.; Ashraf, M.; Shung, K. K.; Chia, R.; Stephens, D. N.; O'Donnell, M.; Mahajan, A.; Balaji, S.; Shivkumar, K.; Sahn, D. J. Development of an electrophysiology (EP)-enabled intracardiac ultrasound catheter integrated with NavX 3-dimensional electrofield mapping for guiding cardiac EP interventions: experimental studies J Ultrasound Med, 2007; 26(11): 1565-74.

Yang, H. M.; Lai, C. K.; Patel, J.; Moore, J.; Chen, P. S.; Shivkumar, K.; Fishbein, M. C. Irreversible intrapulmonary vascular changes after pulmonary vein stenosis complicating catheter ablation for atrial fibrillation Cardiovasc Pathol, 2007; 16(1): 51-5.

Buch, E.; Lellouche, N.; De Diego, C.; Vaseghi, M.; Cesario, D. A.; Fujimura, O.; Wiener, I.; Child, J. S.; Boyle, N. G.; Shivkumar, K. Left ventricular apical wall motion abnormality is associated with lack of response to cardiac resynchronization therapy in patients with ischemic cardiomyopathy Heart Rhythm, 2007; 4(10): 1300-5.

Cesario, D. A.; Mahajan, A.; Shivkumar, K. Lesion-forming technologies for catheter ablation of atrial fibrillation Heart Rhythm, 2007; 4(3 Suppl): S44-50.

Bidart, C.; Vaseghi, M.; Cesario, D. A.; Mahajan, A.; Fujimura, O.; Boyle, N. G.; Shivkumar, K. Radiofrequency current delivery via transseptal needle to facilitate septal puncture Heart Rhythm, 2007; 4(12): 1573-6.

Vaseghi, M.; Shannon, K. M.; Wetzel, G. T.; Shivkumar, K. Reentry around the heart Heart Rhythm, 2007; 4(2): 236-8.

Cesario, D. A.; Brar, R.; Shivkumar, K. Alterations in ion channel physiology in diabetic cardiomyopathy Endocrinol Metab Clin North Am, 2006; 35(3): 601-10, ix-x.

Boyle, N. G.; Shivkumar, K. Arrhythmia diagnosis: simple and elegant Heart Rhythm, 2006; 3(6): 680-1.

Vaseghi, M.; Cesario, D. A.; Mahajan, A.; Wiener, I.; Boyle, N. G.; Fishbein, M. C.; Horowitz, B. N.; Shivkumar, K. Catheter ablation of right ventricular outflow tract tachycardia: value of defining coronary anatomy J Cardiovasc Electrophysiol, 2006; 17(6): 632-7.

Cesario, D. A.; Shenoda, M.; Brar, R.; Shivkumar, K. Left ventricular lead stabilization utilizing a coronary stent Pacing Clin Electrophysiol, 2006; 29(4): 427-8.

Horowitz, B. N.; Vaseghi, M.; Mahajan, A.; Cesario, D. A.; Buch, E.; Valderrabano, M.; Boyle, N. G.; Ellenbogen, K. A.; Shivkumar, K. Percutaneous intrapericardial echocardiography during catheter ablation: a feasibility study Heart Rhythm, 2006; 3(11): 1275-82.

Buch, E.; Cesario, D. A.; Shivkumar, K. The autonomic innervation of the ligament of Marshall J Cardiovasc Electrophysiol, 2006; 17(6): 600-1.

Cesario, D. A.; Vaseghi, M.; Boyle, N. G.; Fishbein, M. C.; Valderrabano, M.; Narasimhan, C.; Wiener, I.; Shivkumar, K. Value of high-density endocardial and epicardial mapping for catheter ablation of hemodynamically unstable ventricular tachycardia Heart Rhythm, 2006; 3(1): 1-10.

Vaseghi, M.; Cesario, D. A.; Ji, S.; Shannon, K. M.; Wiener, I.; Boyle, N. G.; Fonarow, G. C.; Valderrabano, M.; Shivkumar, K. Beyond coronary sinus angiography: the value of coronary arteriography and identification of the pericardiophrenic vein during left ventricular lead placement Pacing Clin Electrophysiol, 2005; 28(3): 185-90.

Vaseghi, M.; Cesario, D.; Swerdlow, C. D.; Shivkumar, K. Counterclockwise atrial flutter in dextrocardia Heart Rhythm, 2005; 2(6): 673-4.

Cesario, D. A.; Broder, H. J.; Fishbein, M. C.; Shivkumar, K. Histopathologic characterization of the atrioventricular conduction axis following catheter ablation Heart Rhythm, 2005; 2(5): 532-5.

Vaseghi, M.; Cesario, D. A.; Valderrabano, M.; Boyle, N. G.; Ratib, O.; Finn, J. P.; Wiener, I.; Shivkumar, K. Impedance monitoring during catheter ablation of atrial fibrillation Heart Rhythm, 2005; 2(9): 914-20.

Vaseghi, M.; Cesario, D.; Shannon, K. M.; Shivkumar, K. Incessant tachycardia following catheter ablation of an accessory pathway: what is the mechanism? Heart Rhythm, 2005; 2(4): 441-2.

Glikson, M.; Swerdlow, C. D.; Gurevitz, O. T.; Daoud, E.; Shivkumar, K.; Wilkoff, B.; Shipman, T.; Friedman, P. A. Optimal combination of discriminators for differentiating ventricular from supraventricular tachycardia by dual-chamber defibrillators J Cardiovasc Electrophysiol, 2005; 16(7): 732-9.

Shivkumar, K. Pulmonary-vein cryoisolation versus left-atrial linear cryoablation for atrial fibrillation Nat Clin Pract Cardiovasc Med, 2005; 2(9): 446-7.

Belikov, S.; Marijic, J.; Laks, H.; Staudacher, M.; Boyle, N.; Shivkumar, K.; Odim, J. Sepsis from insidious pacemaker infection and unsuspected tricuspid valve endocarditis: the importance of transesophageal echocardiography in guiding explantation strategy J Cardiothorac Vasc Anesth, 2005; 19(4): 505-7.

Pai, R. K.; Boyle, N. G.; Child, J. S.; Shivkumar, K. Transient left recurrent laryngeal nerve palsy following catheter ablation of atrial fibrillation Heart Rhythm, 2005; 2(2): 182-4.

Mahajan, A.; Moore, J.; Cesario, D. A.; Shivkumar, K. Use of thoracic epidural anesthesia for management of electrical storm: a case report Heart Rhythm, 2005; 2(12): 1359-62.

Cesario, D.; Bhargava, M.; Valderrabano, M.; Fonarow, G. C.; Wilkoff, B.; Shivkumar, K. Azygos vein lead implantation: a novel adjunctive technique for implantable cardioverter defibrillator placement J Cardiovasc Electrophysiol, 2004; 15(7): 780-3.

Bello, D.; Kipper, S.; Valderrabano, M.; Shivkumar, K. Catheter ablation of ventricular tachycardia guided by contrast-enhanced cardiac computed tomography Heart Rhythm, 2004; 1(4): 490-2.

Cesario, D. A.; Valderrabano, M.; Cai, J. J.; Ji, S.; Shannon, K. M.; Weiss, J. N.; Wiener, I.; Olshansky, B.; Chen, P. S.; Shivkumar, K. Electrophysiological characterization of cardiac veins in humans J Interv Card Electrophysiol, 2004; 10(3): 241-7.

Ji, S.; Cesario, D. A.; Swerdlow, C. D.; Shivkumar, K. Left ventricular endocardial lead placement using a modified transseptal approach J Cardiovasc Electrophysiol, 2004; 15(2): 234-6.

Valderrabano, M.; Cesario, D. A.; Ji, S.; Shannon, K.; Wiener, I.; Swerdlow, C. D.; Oral, H.; Morady, F.; Shivkumar, K. Percutaneous epicardial mapping during ablation of difficult accessory pathways as an alternative to cardiac surgery Heart Rhythm, 2004; 1(3): 311-6.

Ji, S.; Cesario, D.; Valderrabano, M.; Shivkumar, K. The molecular basis of cardiac arrhythmias in patients with cardiomyopathy Curr Heart Fail Rep, 2004; 1(3): 98-103.

Shivkumar, K.; N. Weiss J The slippery slope of human ventricular arrhythmias J Cardiovasc Electrophysiol, 2004; 15(12): 1364-5.

Shivkumar, K.; Valderrabano, M. Use of potassium channel openers for pharmacologic modulation of cardiac excitability J Cardiovasc Electrophysiol, 2004; 15(7): 821-3.

Jagasia, D. H.; Shivkumar, K. Carvedilol reduced mortality and morbidity caused by myocardial infarction in patients with left ventricular dysfunction ACP J Club, 2002; 136(1): 7.

Shivkumar, K. Mechanisms of arrhythmias: are we still "learning while burning"? (editorial) J Cardiovasc Electrophysiol, 2002; 13(4): 393-4.

Shivkumar, K.; Murali, N. S.; Krishnan, S. C. The molecular basis of cardiac arrhythmias J Nucl Cardiol, 2002; 9(2): 206-14.

Christenson, S. D.; Olshansky, B.; Shivkumar, K. Unusual response to atrial extrastimulus testing J Cardiovasc Electrophysiol, 2002; 13(2): 200.

Nerheim, P.; Krishnan, S. C.; Olshansky, B.; Shivkumar, K. Apoptosis in the genesis of cardiac rhythm disorders Cardiol Clin, 2001; 19(1): 155-63.

Shivkumar, K.; Weiss, J. N. Atrial fibrillation: from cells to computers Cardiovasc Res, 2001; 52(2): 171-3.

Doshi, R. N.; Goodman, J.; Naik, A. M.; Shivkumar, K.; Chen, P. S.; Peter, C. T. Initial experience with an active-fixation defibrillation electrode and the presence of nonphysiological sensing Pacing Clin Electrophysiol, 2001; 24(12): 1713-20.

Olshansky, B.; Shivkumar, K. Patient--heal thyself? Electrophysiology meets alternative medicine Pacing Clin Electrophysiol, 2001; 24(4 Pt 1): 403-5.

Shivkumar, K.; Espejo, M.; Kobashigawa, J.; Watanabe, M.; Ikeda, M.; Chuang, J.; Patel, J.; Moriguchi, J.; Hamilton, M.; Kawata, N.; Laks, H. Sudden death after heart transplantation: the major mode of death J Heart Lung Transplant, 2001; 20(2): 180.

Shivkumar, K.; Feliciano, Z.; Boyle, N. G.; Wiener, I. Intradevice interaction in a dual chamber implantable cardioverter defibrillator preventing ventricular tachyarrhythmia detection J Cardiovasc Electrophysiol, 2000; 11(11): 1285-8.

Shivkumar, K.; Schultz, L.; Goldstein, S.; Gheorghiade, M. Effects of propanolol in patients entered in the Beta-Blocker Heart Attack Trial with their first myocardial infarction and persistent electrocardiographic ST-segment depression Am Heart J, 1998; 135(2 Pt 1): 261-7.

Shivkumar, K.; Jafri, S. M.; Gheorghiade, M. Antithrombotic therapy in atrial fibrillation: a review of randomized trials with special reference to the Stroke Prevention in Atrial Fibrillation II (SPAF II) Trial Prog Cardiovasc Dis, 1996; 38(4): 337-42.

Shivkumar, K.; Biksham, G. Statistical approach for the assessment of water pollution around industrial areas: A case study from Patancheru, Medak district, India Environ Monit Assess, 1995; 36(3): 229-49.

Shivkumar, K.; Ravi, K.; Henry, J. W.; Eichenhorn, M. S.; Stein, P. D. Chest radiographs fail to detect right ventricular enlargement and right atrial enlargement in patients with a pure restrictive ventilatory impairment Chest, 1994; 106(2): 381-4.

Shivkumar, K.; Ravi, K.; Henry, J. W.; Eichenhorn, M.; Stein, P. D. Right ventricular dilatation, right ventricular wall thickening, and Doppler evidence of pulmonary hypertension in patients with a pure restrictive ventilatory impairment Chest, 1994; 106(6): 1649-53.

Gheorghiade, M.; Shivkumar, K.; Schultz, L.; Jafri, S.; Tilley, B.; Goldstein, S. Prognostic significance of electrocardiographic persistent ST depression in patients with their first myocardial infarction in the placebo arm of the Beta-Blocker Heart Attack Trial Am Heart J, 1993; 126(2): 271-8.

Stein, P. D.; Gottschalk, A.; Henry, J. W.; Shivkumar, K. Stratification of patients according to prior cardiopulmonary disease and probability assessment based on the number of mismatched segmental equivalent perfusion defects. Approaches to strengthen the diagnostic value of ventilation/perfusion lung scans in acute pulmonary embolism Chest, 1993; 104(5): 1461-7.

Irie, T.; Yamakawa, K.; Hamon, D.; Nakamura, K.; Shivkumar, K.; Vaseghi, M. Cardiac Sympathetic Innervation Via the Middle Cervical and Stellate Ganglia and Anti-Arrhythmic Mechanism of Bilateral Stellectomy Am J Physiol Heart Circ Physiol, 2016; ajpheart 00644 2016.

Frankel, D. S.; Tung, R.; Santangeli, P.; Tzou, W. S.; Vaseghi, M.; Di Biase, L.; Nagashima, K.; Tedrow, U.; Bunch, T. J.; Tholakanahalli, V. N.; Dendi, R.; Reddy, M.; Lakkireddy, D.; Dickfeld, T.; Weiss, J. P.; Mathuria, N.; Vergara, P.; Patel, M.; Nakahara, S.; Vakil, K.; Sauer, W. H.; Callans, D. J.; Natale, A.; Stevenson, W. G.; Della Bella, P.; Shivkumar, K.; Marchlinski, F. E. Sex and Catheter Ablation for Ventricular Tachycardia: An International Ventricular Tachycardia Ablation Center Collaborative Group Study JAMA Cardiol, 2016; 1(8): 938-944.

Salavatian, S.; Beaumont, E.; Longpre, J. P.; Armour, J. A.; Vinet, A.; Jacquemet, V.; Shivkumar, K.; Ardell, J. L. Vagal stimulation targets select populations of intrinsic cardiac neurons to control neurally induced atrial fibrillation Am J Physiol Heart Circ Physiol, 2016; 311(5): H1311-H1320.

Teng, A. E.; Lustgarten, D. L.; Vijayaraman, P.; Tung, R.; Shivkumar, K.; Wagner, G. S.; Ajijola, O. A. Usefulness of His Bundle Pacing to Achieve Electrical Resynchronization in Patients With Complete Left Bundle Branch Block and the Relation Between Native QRS Axis, Duration, and Normalization Am J Cardiol, 2016; 118(4): 527-34.

Shivkumar, K.; Ardell, J. L. Cardiac autonomic control in health and disease J Physiol, 2016; 594(14): 3851-2.

Shivkumar, K.; Ajijola, O. A.; Anand, I.; Armour, J. A.; Chen, P. S.; Esler, M.; De Ferrari, G. M.; Fishbein, M. C.; Goldberger, J. J.; Harper, R. M.; Joyner, M. J.; Khalsa, S. S.; Kumar, R.; Lane, R.; Mahajan, A.; Po, S.; Schwartz, P. J.; Somers, V. K.; Valderrabano, M.; Vaseghi, M.; Zipes, D. P. Clinical neurocardiology defining the value of neuroscience-based cardiovascular therapeutics J Physiol, 2016; 594(14): 3911-54.

Yamakawa, K.; Howard-Quijano, K.; Zhou, W.; Rajendran, P.; Yagishita, D.; Vaseghi, M.; Ajijola, O. A.; Armour, J. A.; Shivkumar, K.; Ardell, J. L.; Mahajan, A. Central vs. peripheral neuraxial sympathetic control of porcine ventricular electrophysiology Am J Physiol Regul Integr Comp Physiol, 2016; 310(5): R414-21.

Rajendran, P. S.; Nakamura, K.; Ajijola, O. A.; Vaseghi, M.; Armour, J. A.; Ardell, J. L.; Shivkumar, K. Myocardial infarction induces structural and functional remodelling of the intrinsic cardiac nervous system J Physiol, 2016; 594(2): 321-41.

Watanabe, A.; Seki, A.; Fishbein, M. C.; Shivkumar, K.; Vaseghi, M. Arrhythmogenic Right Ventricular Cardiomyopathy: Electroarchitecture of the Substrate HeartRhythm Case Rep, 2016; 2(1): 47-51.

Buch, E.; Shivkumar, K. Catheter Ablation of Atrial Fibrillation: Advent of Second-Generation Technologies J Am Coll Cardiol, 2015; 66(12): 1361-3.

Buckley, U.; Shivkumar, K. Implantable cardioverter defibrillators: even better than we thought? Eur Heart J, 2015; 36(26): 1646-8.

Fukuda, K.; Kanazawa, H.; Aizawa, Y.; Ardell, J. L.; Shivkumar, K. Cardiac innervation and sudden cardiac death Circ Res, 2015; 116(12): 2005-19.

Yamakawa, K.; So, E. L.; Rajendran, P. S.; Hoang, J. D.; Makkar, N.; Mahajan, A.; Shivkumar, K.; Vaseghi, M. Electrophysiological effects of right and left vagal nerve stimulation on the ventricular myocardium Am J Physiol Heart Circ Physiol, 2014; 307(5): H722-31.

Bradfield, J. S.; Homsi, M.; Shivkumar, K.; Miller, J. M. Coupling interval variability differentiates ventricular ectopic complexes arising in the aortic sinus of valsalva and great cardiac vein from other sources: mechanistic and arrhythmic risk implications J Am Coll Cardiol, 2014; 63(20): 2151-8.

Rajendran, P. S.; Buch, E.; Shivkumar, K. Marshaling the autonomic nervous system for treatment of atrial fibrillation J Am Coll Cardiol, 2014; 63(18): 1902-3.

Narayan, S. M.; Baykaner, T.; Clopton, P.; Schricker, A.; Lalani, G. G.; Krummen, D. E.; Shivkumar, K.; Miller, J. M. Ablation of rotor and focal sources reduces late recurrence of atrial fibrillation compared with trigger ablation alone: extended follow-up of the CONFIRM trial (Conventional Ablation for Atrial Fibrillation With or Without Focal Impulse and Rotor Modulation) J Am Coll Cardiol, 2014; 63(17): 1761-8.

Ajijola, O. A.; Yagishita, D.; Patel, K. J.; Vaseghi, M.; Zhou, W.; Yamakawa, K.; So, E.; Lux, R. L.; Mahajan, A.; Shivkumar, K. Focal myocardial infarction induces global remodeling of cardiac sympathetic innervation: neural remodeling in a spatial context Am J Physiol Heart Circ Physiol, 2013; 305(7): H1031-40.

Vaseghi, M.; Yamakawa, K.; Sinha, A.; So, E. L.; Zhou, W.; Ajijola, O. A.; Lux, R. L.; Laks, M.; Shivkumar, K.; Mahajan, A. Modulation of regional dispersion of repolarization and T-peak to T-end interval by the right and left stellate ganglia Am J Physiol Heart Circ Physiol, 2013; 305(7): H1020-30.

Narayan, S. M.; Krummen, D. E.; Clopton, P.; Shivkumar, K.; Miller, J. M. Direct or coincidental elimination of stable rotors or focal sources may explain successful atrial fibrillation ablation: on-treatment analysis of the CONFIRM trial (Conventional ablation for AF with or without focal impulse and rotor modulation) J Am Coll Cardiol, 2013; 62(2): 138-47.

Viskin, S.; Wilde, A. A.; Guevara-Valdivia, M. E.; Daoulah, A.; Krahn, A. D.; Zipes, D. P.; Halkin, A.; Shivkumar, K.; Boyle, N. G.; Adler, A.; Belhassen, B.; Schapachnik, E.; Asrar, F.; Rosso, R. Quinidine, a life-saving medication for Brugada syndrome, is inaccessible in many countries J Am Coll Cardiol, 2013; 61(23): 2383-7.

Tung, R.; Shivkumar, K. Integrated care for management of ventricular arrhythmias: can a specialized unit and catheter ablation improve mortality? Circulation, 2013; 127(13): 1354-6.

Zhou, W.; Yamakawa, K.; Benharash, P.; Ajijola, O.; Ennis, D.; Hadaya, J.; Vaseghi, M.; Shivkumar, K.; Mahajan, A. Effect of stellate ganglia stimulation on global and regional left ventricular function as assessed by speckle tracking echocardiography Am J Physiol Heart Circ Physiol, 2013; 304(6): H840-7.

Ajijola, O. A.; Vaseghi, M.; Zhou, W.; Yamakawa, K.; Benharash, P.; Hadaya, J.; Lux, R. L.; Mahajan, A.; Shivkumar, K. Functional differences between junctional and extrajunctional adrenergic receptor activation in mammalian ventricle Am J Physiol Heart Circ Physiol, 2013; 304(4): H579-88.

Mandapati, R.; Shivkumar, K. In silico to in vivo: mutation-specific modeling of arrhythmia risk J Am Coll Cardiol, 2012; 60(21): 2192-3.

Boyle, N. G.; Shivkumar, K. Epicardial interventions in electrophysiology Circulation, 2012; 126(14): 1752-69.

Narayan, S. M.; Krummen, D. E.; Shivkumar, K.; Clopton, P.; Rappel, W. J.; Miller, J. M. Treatment of atrial fibrillation by the ablation of localized sources: CONFIRM (Conventional Ablation for Atrial Fibrillation With or Without Focal Impulse and Rotor Modulation) trial J Am Coll Cardiol, 2012; 60(7): 628-36.

Tung, R.; Buch, E.; Shivkumar, K. Catheter ablation of atrial fibrillation Circulation, 2012; 126(2): 223-9.

Vaseghi, M.; Lux, R. L.; Mahajan, A.; Shivkumar, K. Sympathetic stimulation increases dispersion of repolarization in humans with myocardial infarction Am J Physiol Heart Circ Physiol, 2012; 302(9): H1838-46.

Ajijola, O. A.; Shivkumar, K. Neural remodeling and myocardial infarction: the stellate ganglion as a double agent J Am Coll Cardiol, 2012; 59(10): 962-4.

Ajijola, O. A.; Lellouche, N.; Bourke, T.; Tung, R.; Ahn, S.; Mahajan, A.; Shivkumar, K. Bilateral cardiac sympathetic denervation for the management of electrical storm J Am Coll Cardiol, 2012; 59(1): 91-2.

Shivkumar, K.; Narayan, S. M. Imaging cardiac arrhythmias Sci Transl Med, 2011; 3(98): 98fs2.

Fonseca, C. G.; Backhaus, M.; Bluemke, D. A.; Britten, R. D.; Chung, J. D.; Cowan, B. R.; Dinov, I. D.; Finn, J. P.; Hunter, P. J.; Kadish, A. H.; Lee, D. C.; Lima, J. A.; Medrano-Gracia, P.; Shivkumar, K.; Suinesiaputra, A.; Tao, W.; Young, A. A. The Cardiac Atlas Project--an imaging database for computational modeling and statistical atlases of the heart Bioinformatics, 2011; 27(16): 2288-95.

Tung, R.; Boyle, N. G.; Shivkumar, K. Catheter ablation of ventricular tachycardia Circulation, 2011; 123(20): 2284-8.

Francis, J.; Bourke, T.; Shivkumar, K. Calming the storm by sympatholysis Indian Pacing Electrophysiol J, 2011; 11(2): 31-3.

Tung, R.; Boyle, N. G.; Shivkumar, K. Catheter ablation of ventricular tachycardia Circulation, 2010; 122(3): e389-91.

Bourke, T.; Vaseghi, M.; Michowitz, Y.; Sankhla, V.; Shah, M.; Swapna, N.; Boyle, N. G.; Mahajan, A.; Narasimhan, C.; Lokhandwala, Y.; Shivkumar, K. Neuraxial modulation for refractory ventricular arrhythmias: value of thoracic epidural anesthesia and surgical left cardiac sympathetic denervation Circulation, 2010; 121(21): 2255-62.

Nakahara, S.; Tung, R.; Ramirez, R. J.; Michowitz, Y.; Vaseghi, M.; Buch, E.; Gima, J.; Wiener, I.; Mahajan, A.; Boyle, N. G.; Shivkumar, K. Characterization of the arrhythmogenic substrate in ischemic and nonischemic cardiomyopathy implications for catheter ablation of hemodynamically unstable ventricular tachycardia J Am Coll Cardiol, 2010; 55(21): 2355-65.

Bradfield, J.; Shivkumar, K. ACP Journal Club. Review: Early treatment of a cardiovascular event with nitrates or ACE inhibitors reduces short-term mortality Ann Intern Med, 2010; 152(4): JC-23.

Shivkumar, K.; Tung, R. Improving our understanding of epicardial ventricular tachycardia in nonischemic cardiomyopathy J Am Coll Cardiol, 2009; 54(9): 809-11.

Hijazi, Z. M.; Shivkumar, K.; Sahn, D. J. Intracardiac echocardiography during interventional and electrophysiological cardiac catheterization Circulation, 2009; 119(4): 587-96.

Vaseghi, M.; Boyle, N. G.; Kedia, R.; Patel, J. K.; Cesario, D. A.; Wiener, I.; Kobashigawa, J. A.; Shivkumar, K. Supraventricular tachycardia after orthotopic cardiac transplantation J Am Coll Cardiol, 2008; 51(23): 2241-9.

Lellouche, N.; Buch, E.; Celigoj, A.; Siegerman, C.; Cesario, D.; De Diego, C.; Mahajan, A.; Boyle, N. G.; Wiener, I.; Garfinkel, A.; Shivkumar, K. Functional characterization of atrial electrograms in sinus rhythm delineates sites of parasympathetic innervation in patients with paroxysmal atrial fibrillation J Am Coll Cardiol, 2007; 50(14): 1324-31.

Caples, S. M.; Rosen, C. L.; Shen, W. K.; Gami, A. S.; Cotts, W.; Adams, M.; Dorostkar, P.; Shivkumar, K.; Somers, V. K.; Morgenthaler, T. I.; Stepanski, E. J.; Iber, C. The scoring of cardiac events during sleep J Clin Sleep Med, 2007; 3(2): 147-54.

Lellouche, N.; De Diego, C.; Cesario, D. A.; Vaseghi, M.; Horowitz, B. N.; Mahajan, A.; Wiener, I.; Boyle, N. G.; Fonarow, G. C.; Shivkumar, K. Usefulness of preimplantation B-type natriuretic peptide level for predicting response to cardiac resynchronization therapy Am J Cardiol, 2007; 99(2): 242-6.

Tede, N. H.; Shivkumar, K.; Perloff, J. K.; Middlekauff, H. R.; Fishbein, M. C.; Child, J. S.; Laks, H. Signal-averaged electrocardiogram in Ebstein's anomaly Am J Cardiol, 2004; 93(4): 432-6.

Swerdlow, C.; Shivkumar, K.; Zhang, J. Determination of the upper limit of vulnerability using implantable cardioverter-defibrillator electrograms Circulation, 2003; 107(24): 3028-33.

Shivkumar, K. Images in cardiovascular medicine. Labile repolarization from "cell to bedside" Circulation, 2000; 102(7): 817-8.

Shivkumar, K.; Deutsch, N. A.; Lamp, S. T.; Khuu, K.; Goldhaber, J. I.; Weiss, J. N. Mechanism of hypoxic K loss in rabbit ventricle J Clin Invest, 1997; 100(7): 1782-8.

Krishnan, S. C.; Shivkumar, K.; Garan, H.; Ruskin, J. N. Increased vulnerability of the subendocardium to ischaemic injury: an electrophysiological explanation Lancet, 1995; 346(8990): 1612-4.

Shivkumar, K.; Narins, R. G. Do diuretics cause heart disease? Ann Intern Med, 1995; 123(11): 891-2.

Stein, P. D.; Hamid, M. S.; Shivkumar, K.; Davis, T. P.; Khaja, F.; Henry, J. W. Effects of cyclic flexion of coronary arteries on progression of atherosclerosis Am J Cardiol, 1994; 73(7): 431-7.