Ajijola OA, Tung R, Shivkumar K. Ventricular tachycardia in ischemic heart disease substrates. Indian Heart J. 2014;66S1:S24-S34.

Khalsa SS, Shahabi L, Ajijola OA, Bystritsky A, Naliboff BD, 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.

Methangkool E, Chua JH, 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;28:69-75.

Rajendran PS, Buch E, Shivkumar K. Marshaling the autonomic nervous system for treatment of atrial fibrillation. J Am Coll Cardiol. 2014.

Rashid S, Rapacchi S, Vaseghi M, Tung R, Shivkumar K, Finn JP, Hu P. Improved late gadolinium enhancement mr imaging for patients with implanted cardiac devices. Radiology. 2014;270:269-274.

Reddy YM, Chinitz L, Mansour M, Bunch TJ, Mahapatra S, Swarup V, Di Biase L, Bommana S, Atkins D, Tung R, Shivkumar K, Burkhardt JD, Ruskin J, Natale A, Lakkireddy D. Percutaneous left ventricular assist devices in ventricular tachycardia ablation: A multicenter experience. Circ Arrhythm Electrophysiol. 2014.

Stevens SM, Tung R, Rashid S, Gima J, Cote S, Pavez G, Khan S, Ennis DB, Finn JP, 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;11:289-298.

Vaseghi M, Gima J, Kanaan C, Ajijola OA, 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;11:360-366.


Ajijola OA, Yagishita D, Patel KJ, Vaseghi M, Zhou W, Yamakawa K, So E, Lux RL, 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:H1031-1040.

Ajijola OA, Vaseghi M, Zhou W, Yamakawa K, Benharash P, Hadaya J, Lux RL, Mahajan A, Shivkumar K. Functional differences between junctional and extrajunctional adrenergic receptor activation in mammalian ventricle. Am J Physiol Heart Circ Physiol. 2013;304:H579-588.

Bradfield JS, Tung R, Boyle NG, 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;24:723-727.

Bradfield JS, Huang W, Tung R, Buch E, Okhovat JP, Fujimura O, Boyle NG, Gornbein J, Ellenbogen KA, Shivkumar K. Tissue voltage discordance during tachycardia versus sinus rhythm: Implications for catheter ablation. Heart Rhythm. 2013;10:800-804.

Bradfield JS, Tung R, Shivkumar K. Transmural "Scar-to-scar" Reentrant ventricular tachycardia. Indian Pacing Electrophysiol J. 2013;13:212-216.

Remo BF, Preminger M, Bradfield J, Mittal S, Boyle N, Gupta A, Shivkumar K, Steinberg JS, Dickfeld T. Safety and efficacy of renal denervation as a novel treatment of ventricular tachycardia storm in patients with cardiomyopathy. Heart Rhythm. 2013.

Tholakanahalli VN, 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;10:292-296.

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;10:490-498.

Tung R, Mathuria NS, Nagel R, Mandapati R, Buch EF, Bradfield JS, Vaseghi M, Boyle NG, Shivkumar K. Impact of local ablation on interconnected channels within ventricular scar: Mechanistic implications for substrate modification. Circ Arrhythm Electrophysiol. 2013;6:1131-1138.

Tung R, Shivkumar K. Integrated care for management of ventricular arrhythmias: Can a specialized unit and catheter ablation improve mortality? Circulation. 2013;127:1354-1356.

Tung R, Shivkumar K. The value of image integration for epicardial catheter ablation of ventricular tachycardia. JACC Cardiovasc Imaging. 2013;6:53-55.

Tung R, Shivkumar K. Unusual response to entrainment of ventricular tachycardia: In or out? Heart Rhythm. 2013.

van Dam PM, 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;46:574-579.

Vaseghi M, Yamakawa K, Sinha A, So EL, Zhou W, Ajijola OA, Lux RL, 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:H1020-1030.

Vaseghi M, Fujimura O, Shivkumar K. Narrow qrs complex tachycardia: What is the mechanism? Heart Rhythm. 2013;10:1402-1404.
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;10:1069-1073.

Viskin S, Wilde AA, Guevara-Valdivia ME, Daoulah A, Krahn AD, Zipes DP, Halkin A, Shivkumar K, Boyle NG, Adler A, Belhassen B, Schapachnik E, Asrar F, Rosso R, Fadreguilan EC, Veltman C, Veerakul G, Marquez M, Juneja R, Daoulah AN, Caorsi WR, Cuesta A, Jensen HK, Hamad AK, Spears D, Lozano IF, Urda VC, Peinado R, Panduranga P, Emkanjoo Z, Bergfeldt L, Janousek J. Quinidine, a life-saving medication for brugada syndrome, is inaccessible in many countries. J Am Coll Cardiol. 2013;61:2383-2387.

Yagishita D, Ajijola OA, 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;6:776-783.

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:H840-847.


Ajijola OA, 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;59:91-92.

Ajijola OA, Vaseghi M, Mahajan A, Shivkumar K. Bilateral cardiac sympathetic denervation: Why, who and when? Expert Rev Cardiovasc Ther. 2012;10:947-949.

Ajijola OA, Wisco JJ, Lambert HW, Mahajan A, Stark E, Fishbein MC, Shivkumar K. Extracardiac neural remodeling in humans with cardiomyopathy. Circ Arrhythm Electrophysiol. 2012;5:1010-1116.

Ajijola OA, Shivkumar K. Neural remodeling and myocardial infarction: The stellate ganglion as a double agent. J Am Coll Cardiol. 2012;59:962-964.

Boyle NG, Shivkumar K. Epicardial interventions in electrophysiology. Circulation. 2012;126:1752-1769.

Bradfield J, Shapiro S, Finch W, Tung R, Boyle NG, Buch E, Mathuria N, Mandapati R, Shivkumar K, Bersohn M. Catheter ablation of typical atrial flutter in severe pulmonary hypertension. J Cardiovasc Electrophysiol. 2012;23:1185-1190.

Bradfield J, Tung R, Mandapati R, Boyle NG, Shivkumar K. Catheter ablation utilizing remote magnetic navigation: A review of applications and outcomes. Pacing Clin Electrophysiol. 2012;35:1021-1034.

Bradfield JS, Buch E, Shivkumar K. Interventions to decrease the morbidity and mortality associated with implantable cardioverter-defibrillator shocks. Curr Opin Crit Care. 2012;18:432-437.

Bradfield J, Boyle NG, 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;9:51-56.

Discepolo W, Buch E, Shivkumar K. How to target postablation perimitral flutter: Valve isthmus or pv triggers? J Cardiovasc Electrophysiol. 2012;23:145-146.

Kneller J, Shivkumar K, Tung R. Assessment of his-purkinje reserve: What is the mechanism of block? Heart Rhythm. 2012;9:465-466.

Mandapati R, Shivkumar K. In silico to in vivo: Mutation-specific modeling of arrhythmia risk. J Am Coll Cardiol. 2012;60:2192-2193.

Mathuria N, Tung R, Shivkumar K. Advances in ablation of ventricular tachycardia in nonischemic cardiomyopathy. Curr Cardiol Rep. 2012;14:577-583.

Mathuria N, Buch E, Shivkumar K. Pleuropericardial fistula formation after prior epicardial catheter ablation for ventricular tachycardia. Circ Arrhythm Electrophysiol. 2012;5:e18-19
Michowitz Y, Buch E, Bourke T, Tung R, Bradfield J, Mathuria N, Boyle NG, Shivkumar K. Unipolar and bipolar electrogram characteristics predict exit block during pulmonary vein antral isolation. Pacing Clin Electrophysiol. 2012;35:1294-1301.

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:e127-130.

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;35:97-99
Narayan SM, Krummen DE, Shivkumar K, Clopton P, Rappel WJ, Miller JM. 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;60:628-636.

Shivkumar K, Ellenbogen KA, Hummel JD, Miller JM, Steinberg JS. 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;23:1277-1285.

Stephens DN, Truong UT, Nikoozadeh A, Oralkan O, Seo CH, 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 DJ. First in vivo use of a capacitive micromachined ultrasound transducer array-based imaging and ablation catheter. J Ultrasound Med. 2012;31:247-256.

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;12:229-232.

Tung R, Buch E, Shivkumar K. Catheter ablation of atrial fibrillation. Circulation. 2012;126:223-229.

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;5:264-272.

Vaseghi M, Shivkumar K. Neuraxial modulation for ventricular arrhythmias: A new hope. Heart Rhythm. 2012;9:1888-1889.

Vaseghi M, Zhou W, Shi J, Ajijola OA, Hadaya J, Shivkumar K, Mahajan A. Sympathetic innervation of the anterior left ventricular wall by the right and left stellate ganglia. Heart Rhythm. 2012;9:1303-1309.

Vaseghi M, Lux RL, Mahajan A, Shivkumar K. Sympathetic stimulation increases dispersion of repolarization in humans with myocardial infarction. Am J Physiol Heart Circ Physiol. 2012;302:H1838-1846.


Bai R, Di Biase L, Shivkumar K, Mohanty P, Tung R, Santangeli P, Saenz LC, Vacca M, Verma A, Khaykin Y, Mohanty S, Burkhardt JD, 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;4:478-485.

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;29:50-56.

Bourke T, Mathuria N, Michowitz Y, Shivkumar K. Hybrid techniques and neuraxial modulation for treatment of ventricular tachycardia. Future Cardiol. 2011;7:273-276.

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

Bradfield J, Tung R, Boyle NG, Shivkumar K. Managing patients with icd shocks and programming tachycardia therapies during acute heart failure syndromes. Heart Fail Rev. 2011;16:449-456
Bradfield J, Buch E, Shivkumar K. Three dissociated rhythms after ablation of an atypical right atrial flutter. J Cardiovasc Electrophysiol. 2011;22:477.

Di Biase L, Al-Ahamad A, Santangeli P, Hsia HH, Sanchez J, Bai R, Bailey S, Horton R, Gallinghouse GJ, Burkhardt DJ, 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;8:968-974.

Fonseca CG, Backhaus M, Bluemke DA, Britten RD, Chung JD, Cowan BR, Dinov ID, Finn JP, Hunter PJ, Kadish AH, Lee DC, Lima JA, Medrano-Gracia P, Shivkumar K, Suinesiaputra A, Tao W, Young AA. The cardiac atlas project--an imaging database for computational modeling and statistical atlases of the heart. Bioinformatics. 2011;27:2288-2295.

Francis J, Bourke T, Shivkumar K. Calming the storm by sympatholysis. Indian Pacing Electrophysiol J. 2011;11:31-33.

Lee W, Griffin W, Wildes D, Buckley D, Topka T, Chodakauskas T, Langer M, Calisti S, Bergstøl S, Malacrida JP, 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;58:1478-1491.

Lellouche N, De Diego C, Boyle NG, Wiener I, Akopyan G, Child JS, Shivkumar K. Relationship between mechanical and electrical remodelling in patients with cardiac resynchronization implanted defibrillators. Europace. 2011;13:1180-1187.

Mathuria NS, Vaseghi M, Buch E, Shivkumar K. Successful ablation of an epicardial ventricular tachycardia using a surgical ablation tool. Circ Arrhythm Electrophysiol. 2011;4:e84-86.

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;13:683-688.

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;34:37-46.

Nakahara S, Vaseghi M, Ramirez RJ, Fonseca CG, Lai CK, Finn JP, Mahajan A, Boyle NG, Shivkumar K. Characterization of myocardial scars: Electrophysiological imaging correlates in a porcine infarct model. Heart Rhythm. 2011;8:1060-1067.

Ramirez RJ, Ajijola OA, Zhou W, Holmström B, Lüning H, Laks MM, Shivkumar K, Mahajan A. A new electrocardiographic marker for sympathetic nerve stimulation: Modulation of repolarization by stimulation of stellate ganglia. J Electrocardiol. 2011;44:694-699.

Seo CH, Stephens DN, Cannata J, Dentinger A, Lin F, Park S, Wildes D, Thomenius KE, Chen P, Nguyen T, de La Rama A, Jeong JS, Mahajan A, Shivkumar K, Nikoozadeh A, Oralkan O, Truong U, Sahn DJ, Khuri-Yakub PT, 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;58:1406-1417.

Shackley BS, Nguyen TP, Shivkumar K, Finn PJ, Fishbein MC. Idiopathic massive myocardial calcification: A case report and review of the literature. Cardiovasc Pathol. 2011;20:e79-83.

Shivkumar K, Narayan SM. Imaging cardiac arrhythmias. Sci Transl Med. 2011;3:98fs92.

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;8:439-447.

Tung R, Boyle NG, Shivkumar K. Catheter ablation of ventricular tachycardia. Circulation. 2011;123:2284-2288.

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


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;5:430-434.

Bourke T, Vaseghi M, Michowitz Y, Sankhla V, Shah M, Swapna N, Boyle NG, 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;121:2255-2262.

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:JC-23.

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;21:1062-1063.

Dave AS, Aboulhosn J, Child JS, Shivkumar K. Transconduit puncture for catheter ablation of atrial tachycardia in a patient with extracardiac fontan palliation. Heart Rhythm. 2010;7:413-416.

Ho JK, Nakahara S, Shivkumar K, Mahajan A. Live three-dimensional transesophageal echocardiographic imaging of novel multielectrode ablation catheters. Heart Rhythm. 2010;7:570-571.

Khuri-Yakub BT, Oralkan O, Nikoozadeh A, Wygant IO, Zhuang S, Gencel M, Choe JW, Stephens DN, de la Rama A, Chen P, Lin F, Dentinger A, Wildes D, Thomenius K, Shivkumar K, Mahajan A, Seo CH, O'Donnell M, Truong U, Sahn DJ. Miniaturized ultrasound imaging probes enabled by cmut arrays with integrated frontend electronic circuits. Conf Proc IEEE Eng Med Biol Soc. 2010;2010:5987-5990.

Mandapati R, Shivkumar K. The autonomic stress of sleep: Sleeping the sleep of death. Heart Rhythm. 2010;7:1075-1076.

Michowitz Y, Mathuria N, Tung R, Esmailian F, Kwon M, Nakahara S, Bourke T, Boyle NG, Mahajan A, Shivkumar K. Hybrid procedures for epicardial catheter ablation of ventricular tachycardia: Value of surgical access. Heart Rhythm. 2010;7:1635-1643.

Nakahara S, Tung R, Ramirez RJ, Michowitz Y, Vaseghi M, Buch E, Gima J, Wiener I, Mahajan A, Boyle NG, 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;55:2355-2365.

Nakahara S, Tung R, Ramirez RJ, Gima J, Wiener I, Mahajan A, Boyle NG, Shivkumar K. Distribution of late potentials within infarct scars assessed by ultra high-density mapping. Heart Rhythm. 2010;7:1817-1824.

Nakahara S, Ramirez RJ, Buch E, Michowitz Y, Vaseghi M, de Diego C, Boyle NG, 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;7:81-87.     

Natale A, Raviele A, Al-Ahmad A, Alfieri O, Aliot E, Almendral J, Breithardt G, Brugada J, Calkins H, Callans D, Cappato R, Camm JA, Della Bella P, Guiraudon GM, Haïssaguerre M, Hindricks G, Ho SY, Kuck KH, Marchlinski F, Packer DL, Prystowsky EN, Reddy VY, Ruskin JN, Scanavacca M, Shivkumar K, Soejima K, Stevenson WJ, Themistoclakis S, Verma A, Wilber D, members VC. Venice chart international consensus document on ventricular tachycardia/ventricular fibrillation ablation. J Cardiovasc Electrophysiol. 2010;21:339-379.     

Santangeli P, Di Biase L, Lakkireddy D, Burkhardt JD, Pillarisetti J, Michowitz Y, Sanchez JE, Horton R, Mohanty P, Gallinghouse GJ, 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;7:1036-1042.

Tung R, Boyle NG, Shivkumar K. Catheter ablation of ventricular tachycardia. Circulation. 2010;122:e389-391.

Tung R, Nakahara S, Ramirez R, Lai C, Fishbein MC, Shivkumar K. Distinguishing epicardial fat from scar: Analysis of electrograms using high-density electroanatomic mapping in a novel porcine infarct model. Heart Rhythm. 2010;7:389-395.

Vaseghi M, Shivkumar K. Catheter ablation of idiopathic ventricular tachycardia. Circ Arrhythm Electrophysiol. 2010;3:219-221.


Boyle NG, Shivkumar K. Atrial fibrillation in congestive heart failure: Current management. Cardiol Clin. 2009;27:79-93, viii-ix.

Buch E, Tung R, Shehata M, Shivkumar K. Alternating cycle length during supraventricular tachycardia: What is the mechanism? J Cardiovasc Electrophysiol. 2009;20:1071-1073.

Buch E, Nakahara S, Shivkumar K. Diagnostic maneuver during narrow-complex tachycardia: What is the arrhythmia mechanism? Heart Rhythm. 2009;6:716-717.

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;32:340-345.

Hijazi ZM, Shivkumar K, Sahn DJ. Intracardiac echocardiography during interventional and electrophysiological cardiac catheterization. Circulation. 2009;119:587-596.

Ho JK, Liakopoulos OJ, Crowley R, Yezbick AB, Sanchez E, Shivkumar K, Mahajan A. In vivo detection of myocardial ischemia in pigs using visible light spectroscopy. Anesth Analg. 2009;108:1185-1192.

Sahn DJ, Stephens DN, Cannata JM, Shung K, Oralkan O, Nikoozadeh A, Khuri-Yakub BT, Nguyen H, Chen P, Dentinger AM, Wildes D, Thomenius KE, 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;2009:1913-1917.

Schenke-Layland K, Stock UA, Nsair A, Xie J, Angelis E, Fonseca CG, Larbig R, Mahajan A, Shivkumar K, Fishbein MC, MacLellan WR. Cardiomyopathy is associated with structural remodelling of heart valve extracellular matrix. Eur Heart J. 2009;30:2254-2265.

Shivkumar K, Tung R. Improving our understanding of epicardial ventricular tachycardia in nonischemic cardiomyopathy. J Am Coll Cardiol. 2009;54:809-811.

Shivkumar K, Buch E, Boyle NG. Nonpharmacologic management of atrial fibrillation: Role of the pulmonary veins and posterior left atrium. Heart Rhythm. 2009;6:S5-S11.

Stephens DN, O'Donnell M, Thomenius K, Dentinger A, Wildes D, Chen P, Shung KK, Cannata J, Khuri-Yakub P, Oralkan O, Mahajan A, Shivkumar K, Sahn DJ. Experimental studies with a 9f forward-looking intracardiac imaging and ablation catheter. J Ultrasound Med. 2009;28:207-215.

Tung R, Shivkumar K. Ripple mapping: Making electroanatomic mapping user-friendly. Heart Rhythm. 2009;6:1763-1764.

Vaseghi M, Lellouche N, Ritter H, Fonarow GC, Patel JK, Moriguchi J, Fishbein MC, Kobashigawa JA, Shivkumar K. Mode and mechanisms of death after orthotopic heart transplantation. Heart Rhythm. 2009;6:503-509.


Boyle NG, Shivkumar K. Atrial fibrillation and congestive heart failure. Curr Heart Fail Rep. 2008;5:11-15.

Buch E, Shivkumar K. Exploring the potential of pulmonary vein recordings: Can they help elucidate mechanisms of paroxysmal atrial fibrillation? Europace. 2008;10:690-691.

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;5:1473-1475.

Mahajan A, Crowley R, Ho JK, Sanchez E, Trivedi P, Natterson B, Shivkumar K. Imaging the ascending aorta and aortic arch using transesophageal echocardiography: The expanded aortic view. Echocardiography. 2008;25:408-413.

Nikoozadeh A, Wygant IO, Lin DS, Oralkan O, Ergun AS, Stephens DN, Thomenius KE, Dentinger AM, Wildes D, Akopyan G, Shivkumar K, Mahajan A, Sahn DJ, Khuri-Yakub BT. Forward-looking intracardiac ultrasound imaging using a 1-d cmut array integrated with custom front-end electronics. IEEE Trans Ultrason Ferroelectr Freq Control. 2008;55:2651-2660.

Ramirez RJ, Shivkumar K. Latent atrial fibrillation triggers originating in accessory pathways. Heart Rhythm. 2008;5:1248-1249.

Shivkumar K. Percutaneous epicardial ablation of atrial fibrillation. Heart Rhythm. 2008;5:152-154.

Stephens DN, Cannata J, Liu R, Zhao JZ, Shung KK, Nguyen H, Chia R, Dentinger A, Wildes D, Thomenius KE, 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;55:602-618.

Vaseghi M, Boyle NG, Kedia R, Patel JK, Cesario DA, Wiener I, Kobashigawa JA, Shivkumar K. Supraventricular tachycardia after orthotopic cardiac transplantation. J Am Coll Cardiol. 2008;51:2241-2249.

Vaseghi M, Shivkumar K. The role of the autonomic nervous system in sudden cardiac death. Prog Cardiovasc Dis. 2008;50:404-419.


Bidart C, Vaseghi M, Cesario DA, Mahajan A, Fujimura O, Boyle NG, Shivkumar K. Radiofrequency current delivery via transseptal needle to facilitate septal puncture. Heart Rhythm. 2007;4:1573-1576.

Buch E, Vaseghi M, Cesario DA, Shivkumar K. A novel method for preventing phrenic nerve injury during catheter ablation. Heart Rhythm. 2007;4:95-98.

Buch E, Lellouche N, De Diego C, Vaseghi M, Cesario DA, Fujimura O, Wiener I, Child JS, Boyle NG, 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;4:1300-1305.

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

Lellouche N, De Diego C, Vaseghi M, Buch E, Cesario DA, Mahajan A, Wiener I, Fonarow GC, Boyle NG, Shivkumar K. Cardiac resynchronization therapy response is associated with shorter duration of atrial fibrillation. Pacing Clin Electrophysiol. 2007;30:1363-1368.

Lellouche N, De Diego C, Akopyan G, Boyle NG, Mahajan A, Cesario DA, 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;4:1274-1283.

Lellouche N, Buch E, Celigoj A, Siegerman C, Cesario D, De Diego C, Mahajan A, Boyle NG, 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;50:1324-1331.

Lellouche N, De Diego C, Cesario DA, Vaseghi M, Horowitz BN, Mahajan A, Wiener I, Boyle NG, Fonarow GC, Shivkumar K. Usefulness of preimplantation b-type natriuretic peptide level for predicting response to cardiac resynchronization therapy. Am J Cardiol. 2007;99:242-246.

Li XK, Pemberton J, Thomenius K, Dentinger A, Lowe RI, Ashraf M, Shung KK, Chia R, Stephens DN, O'Donnell M, Mahajan A, Balaji S, Shivkumar K, Sahn DJ. 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;26:1565-1574.

Vaseghi M, Shannon KM, Wetzel GT, Shivkumar K. Reentry around the heart. Heart Rhythm. 2007;4:236-238.

Yang HM, Lai CK, Patel J, Moore J, Chen PS, Shivkumar K, Fishbein MC. Irreversible intrapulmonary vascular changes after pulmonary vein stenosis complicating catheter ablation for atrial fibrillation. Cardiovasc Pathol. 2007;16:51-55.


Boyle NG, Shivkumar K. Arrhythmia diagnosis: Simple and elegant. Heart Rhythm. 2006;3:680-681.

Buch E, Cesario DA, Shivkumar K. The autonomic innervation of the ligament of marshall. J Cardiovasc Electrophysiol. 2006;17:600-601.

Cesario DA, Brar R, Shivkumar K. Alterations in ion channel physiology in diabetic cardiomyopathy. Endocrinol Metab Clin North Am. 2006;35:601-610, ix-x.

Cesario DA, Shenoda M, Brar R, Shivkumar K. Left ventricular lead stabilization utilizing a coronary stent. Pacing Clin Electrophysiol. 2006;29:427-428.

Cesario DA, Vaseghi M, Boyle NG, Fishbein MC, Valderrábano 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;3:1-10.

Horowitz BN, Vaseghi M, Mahajan A, Cesario DA, Buch E, Valderrábano M, Boyle NG, Ellenbogen KA, Shivkumar K. Percutaneous intrapericardial echocardiography during catheter ablation: A feasibility study. Heart Rhythm. 2006;3:1275-1282.

Vaseghi M, Cesario DA, Mahajan A, Wiener I, Boyle NG, Fishbein MC, Horowitz BN, Shivkumar K. Catheter ablation of right ventricular outflow tract tachycardia: Value of defining coronary anatomy. J Cardiovasc Electrophysiol. 2006;17:632-637.


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;19:505-507.

Cesario DA, Broder HJ, Fishbein MC, Shivkumar K. Histopathologic characterization of the atrioventricular conduction axis following catheter ablation. Heart Rhythm. 2005;2:532-535.

Glikson M, Swerdlow CD, Gurevitz OT, Daoud E, Shivkumar K, Wilkoff B, Shipman T, Friedman PA. Optimal combination of discriminators for differentiating ventricular from supraventricular tachycardia by dual-chamber defibrillators. J Cardiovasc Electrophysiol. 2005;16:732-739.

Mahajan A, Moore J, Cesario DA, Shivkumar K. Use of thoracic epidural anesthesia for management of electrical storm: A case report. Heart Rhythm. 2005;2:1359-1362.

Pai RK, Boyle NG, Child JS, Shivkumar K. Transient left recurrent laryngeal nerve palsy following catheter ablation of atrial fibrillation. Heart Rhythm. 2005;2:182-184.

Shivkumar K. Pulmonary-vein cryoisolation versus left-atrial linear cryoablation for atrial fibrillation. Nat Clin Pract Cardiovasc Med. 2005;2:446-447.

Vaseghi M, Cesario DA, Ji S, Shannon KM, Wiener I, Boyle NG, Fonarow GC, Valderrábano 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;28:185-190.

Vaseghi M, Cesario D, Swerdlow CD, Shivkumar K. Counterclockwise atrial flutter in dextrocardia. Heart Rhythm. 2005;2:673-674.

Vaseghi M, Cesario DA, Valderrabano M, Boyle NG, Ratib O, Finn JP, Wiener I, Shivkumar K. Impedance monitoring during catheter ablation of atrial fibrillation. Heart Rhythm. 2005;2:914-920.

Vaseghi M, Cesario D, Shannon KM, Shivkumar K. Incessant tachycardia following catheter ablation of an accessory pathway: What is the mechanism? Heart Rhythm. 2005;2:441-442.


Bello D, Kipper S, Valderrábano M, Shivkumar K. Catheter ablation of ventricular tachycardia guided by contrast-enhanced cardiac computed tomography. Heart Rhythm. 2004;1:490-492.

Cesario D, Bhargava M, Valderrábano M, Fonarow GC, Wilkoff B, Shivkumar K. Azygos vein lead implantation: A novel adjunctive technique for implantable cardioverter defibrillator placement. J Cardiovasc Electrophysiol. 2004;15:780-783.

Cesario DA, Valderrabano M, Cai JJ, Ji S, Shannon KM, Weiss JN, Wiener I, Olshansky B, Chen PS, Shivkumar K. Electrophysiological characterization of cardiac veins in humans. J Interv Card Electrophysiol. 2004;10:241-247.

Ji S, Cesario DA, Swerdlow CD, Shivkumar K. Left ventricular endocardial lead placement using a modified transseptal approach. J Cardiovasc Electrophysiol. 2004;15:234-236.

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

Shivkumar K, N Weiss J. The slippery slope of human ventricular arrhythmias. J Cardiovasc Electrophysiol. 2004;15:1364-1365.

Shivkumar K, Valderrabano M. Use of potassium channel openers for pharmacologic modulation of cardiac excitability. J Cardiovasc Electrophysiol. 2004;15:821-823.

Tede NH, Shivkumar K, Perloff JK, Middlekauff HR, Fishbein MC, Child JS, Laks H. Signal-averaged electrocardiogram in ebstein's anomaly. Am J Cardiol. 2004;93:432-436.

Valderrábano M, Cesario DA, Ji S, Shannon K, Wiener I, Swerdlow CD, Oral H, Morady F, Shivkumar K. Percutaneous epicardial mapping during ablation of difficult accessory pathways as an alternative to cardiac surgery. Heart Rhythm. 2004;1:311-316.


Swerdlow C, Shivkumar K, Zhang J. Determination of the upper limit of vulnerability using implantable cardioverter-defibrillator electrograms. Circulation. 2003;107:3028-3033.


Christenson SD, Olshansky B, Shivkumar K. Unusual response to atrial extrastimulus testing. J Cardiovasc Electrophysiol. 2002;13:200.

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

Shivkumar K. Mechanisms of arrhythmias: Are we still "Learning while burning"? (editorial). J Cardiovasc Electrophysiol. 2002;13:393-394.

Shivkumar K, Murali NS, Krishnan SC. The molecular basis of cardiac arrhythmias. J Nucl Cardiol. 2002;9:206-214.