Publications

2014

Ajijola OA, Tung R, Shivkumar K. Ventricular tachycardia in ischemic heart disease substrates. Indian Heart J. 2014;66S1:S24-S34.
http://www.ncbi.nlm.nih.gov/pubmed/24568826

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.
http://www.ncbi.nlm.nih.gov/pubmed/24427121

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.
http://www.ncbi.nlm.nih.gov/pubmed/24290748

Rajendran PS, Buch E, Shivkumar K. Marshaling the autonomic nervous system for treatment of atrial fibrillation. J Am Coll Cardiol. 2014.
http://www.ncbi.nlm.nih.gov/pubmed/24561143

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.
http://www.ncbi.nlm.nih.gov/pubmed/24086074

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.
http://www.ncbi.nlm.nih.gov/pubmed/24532564

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.
http://www.ncbi.nlm.nih.gov/pubmed/24140812

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.
http://www.ncbi.nlm.nih.gov/pubmed/24291775

2013

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.
http://www.ncbi.nlm.nih.gov/pubmed/23893167

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.
http://www.ncbi.nlm.nih.gov/pubmed/23241324

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.
http://www.ncbi.nlm.nih.gov/pubmed/23279311

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.
http://www.ncbi.nlm.nih.gov/pubmed/23434619

Bradfield JS, Tung R, Shivkumar K. Transmural "Scar-to-scar" Reentrant ventricular tachycardia. Indian Pacing Electrophysiol J. 2013;13:212-216.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3876580/

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.
http://www.ncbi.nlm.nih.gov/pubmed/24389229

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.
http://www.ncbi.nlm.nih.gov/pubmed/23089899

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.
http://www.ncbi.nlm.nih.gov/pubmed/23246598

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.
http://www.ncbi.nlm.nih.gov/pubmed/24162832

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.
http://www.ncbi.nlm.nih.gov/pubmed/23547176

Tung R, Shivkumar K. The value of image integration for epicardial catheter ablation of ventricular tachycardia. JACC Cardiovasc Imaging. 2013;6:53-55.
http://www.ncbi.nlm.nih.gov/pubmed/23328561

Tung R, Shivkumar K. Unusual response to entrainment of ventricular tachycardia: In or out? Heart Rhythm. 2013.
http://www.ncbi.nlm.nih.gov/pubmed/24016698

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.
http://www.ncbi.nlm.nih.gov/pubmed/24028996

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.
http://www.ncbi.nlm.nih.gov/pubmed/23893168

Vaseghi M, Fujimura O, Shivkumar K. Narrow qrs complex tachycardia: What is the mechanism? Heart Rhythm. 2013;10:1402-1404.
http://www.ncbi.nlm.nih.gov/pubmed/22885663
 
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.
http://www.ncbi.nlm.nih.gov/pubmed/23643678

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.
http://www.ncbi.nlm.nih.gov/pubmed/23583244

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.
http://www.ncbi.nlm.nih.gov/pubmed/23873142

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.
http://www.ncbi.nlm.nih.gov/pubmed/23335795

2012

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.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470807/

Ajijola OA, Vaseghi M, Mahajan A, Shivkumar K. Bilateral cardiac sympathetic denervation: Why, who and when? Expert Rev Cardiovasc Ther. 2012;10:947-949.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3551540/

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.
http://www.ncbi.nlm.nih.gov/pubmed/22923270

Ajijola OA, Shivkumar K. Neural remodeling and myocardial infarction: The stellate ganglion as a double agent. J Am Coll Cardiol. 2012;59:962-964.
http://www.ncbi.nlm.nih.gov/pubmed/22381433

Boyle NG, Shivkumar K. Epicardial interventions in electrophysiology. Circulation. 2012;126:1752-1769.
http://www.ncbi.nlm.nih.gov/pubmed/23027811

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.
http://www.ncbi.nlm.nih.gov/pubmed/22734591

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.
http://www.ncbi.nlm.nih.gov/pubmed/22510160

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.
http://www.ncbi.nlm.nih.gov/pubmed/22889870

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.
http://www.ncbi.nlm.nih.gov/pubmed/22135184

Discepolo W, Buch E, Shivkumar K. How to target postablation perimitral flutter: Valve isthmus or pv triggers? J Cardiovasc Electrophysiol. 2012;23:145-146.
http://www.ncbi.nlm.nih.gov/pubmed/22049914

Kneller J, Shivkumar K, Tung R. Assessment of his-purkinje reserve: What is the mechanism of block? Heart Rhythm. 2012;9:465-466.
http://www.ncbi.nlm.nih.gov/pubmed/21126603

Mandapati R, Shivkumar K. In silico to in vivo: Mutation-specific modeling of arrhythmia risk. J Am Coll Cardiol. 2012;60:2192-2193.
http://www.ncbi.nlm.nih.gov/pubmed/23153845

Mathuria N, Tung R, Shivkumar K. Advances in ablation of ventricular tachycardia in nonischemic cardiomyopathy. Curr Cardiol Rep. 2012;14:577-583.
http://www.ncbi.nlm.nih.gov/pubmed/22843484

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.
http://www.ncbi.nlm.nih.gov/pubmed/22897649

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.
http://www.ncbi.nlm.nih.gov/pubmed/22564003

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.
http://www.ncbi.nlm.nih.gov/pubmed/22818076

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.
http://www.ncbi.nlm.nih.gov/pubmed/23130890

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.
http://www.ncbi.nlm.nih.gov/pubmed/22298868

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.
http://www.ncbi.nlm.nih.gov/pubmed/23071385

Tung R, Buch E, Shivkumar K. Catheter ablation of atrial fibrillation. Circulation. 2012;126:223-229.
http://www.ncbi.nlm.nih.gov/pubmed/22777665

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.
http://www.ncbi.nlm.nih.gov/pubmed/22333344

Vaseghi M, Shivkumar K. Neuraxial modulation for ventricular arrhythmias: A new hope. Heart Rhythm. 2012;9:1888-1889.
http://www.ncbi.nlm.nih.gov/pubmed/23036525

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.
http://www.ncbi.nlm.nih.gov/pubmed/22465457

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.
http://www.ncbi.nlm.nih.gov/pubmed/22345568

2011

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.
http://www.ncbi.nlm.nih.gov/pubmed/21665983

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.
http://www.ncbi.nlm.nih.gov/pubmed/20980115

Bourke T, Mathuria N, Michowitz Y, Shivkumar K. Hybrid techniques and neuraxial modulation for treatment of ventricular tachycardia. Future Cardiol. 2011;7:273-276.
http://www.ncbi.nlm.nih.gov/pubmed/21627467

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.
http://www.ncbi.nlm.nih.gov/pubmed/20433945

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.
http://www.ncbi.nlm.nih.gov/pubmed/21451976

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.
http://www.ncbi.nlm.nih.gov/pubmed/21376835

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.
http://www.ncbi.nlm.nih.gov/pubmed/21737439

Francis J, Bourke T, Shivkumar K. Calming the storm by sympatholysis. Indian Pacing Electrophysiol J. 2011;11:31-33.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3063612/

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.
http://www.ncbi.nlm.nih.gov/pubmed/21768032

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.
http://www.ncbi.nlm.nih.gov/pubmed/21486911

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.
http://www.ncbi.nlm.nih.gov/pubmed/22203665

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.
http://www.ncbi.nlm.nih.gov/pubmed/21252192

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.
http://www.ncbi.nlm.nih.gov/pubmed/20946283

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.
http://www.ncbi.nlm.nih.gov/pubmed/21354335

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.
http://www.ncbi.nlm.nih.gov/pubmed/21917265

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.
http://www.ncbi.nlm.nih.gov/pubmed/21768025

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.
http://www.ncbi.nlm.nih.gov/pubmed/20598909

Shivkumar K, Narayan SM. Imaging cardiac arrhythmias. Sci Transl Med. 2011;3:98fs92.
http://www.ncbi.nlm.nih.gov/pubmed/21885402

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.
http://www.ncbi.nlm.nih.gov/pubmed/21056123

Tung R, Boyle NG, Shivkumar K. Catheter ablation of ventricular tachycardia. Circulation. 2011;123:2284-2288.
http://www.ncbi.nlm.nih.gov/pubmed/21606407

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.
http://www.ncbi.nlm.nih.gov/pubmed/20653813

2010

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.
http://www.ncbi.nlm.nih.gov/pubmed/21087427

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.
http://www.ncbi.nlm.nih.gov/pubmed/20479150

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.
http://www.ncbi.nlm.nih.gov/pubmed/20455981

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.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2852427/

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.
http://www.ncbi.nlm.nih.gov/pubmed/19875342

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.
http://www.ncbi.nlm.nih.gov/pubmed/21097106

Mandapati R, Shivkumar K. The autonomic stress of sleep: Sleeping the sleep of death. Heart Rhythm. 2010;7:1075-1076.
http://www.ncbi.nlm.nih.gov/pubmed/20621623

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.
http://www.ncbi.nlm.nih.gov/pubmed/20633702

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.
http://www.ncbi.nlm.nih.gov/pubmed/20488307

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.
http://www.ncbi.nlm.nih.gov/pubmed/20682358

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.
http://www.ncbi.nlm.nih.gov/pubmed/19914143     

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.
http://www.ncbi.nlm.nih.gov/pubmed/20082650     

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.
http://www.ncbi.nlm.nih.gov/pubmed/20493276

Tung R, Boyle NG, Shivkumar K. Catheter ablation of ventricular tachycardia. Circulation. 2010;122:e389-391.
http://www.ncbi.nlm.nih.gov/pubmed/20644021

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.
http://www.ncbi.nlm.nih.gov/pubmed/20185114

Vaseghi M, Shivkumar K. Catheter ablation of idiopathic ventricular tachycardia. Circ Arrhythm Electrophysiol. 2010;3:219-221.
http://www.ncbi.nlm.nih.gov/pubmed/20551420

2009

Boyle NG, Shivkumar K. Atrial fibrillation in congestive heart failure: Current management. Cardiol Clin. 2009;27:79-93, viii-ix.
http://www.ncbi.nlm.nih.gov/pubmed/19111766

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.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3073145/

Buch E, Nakahara S, Shivkumar K. Diagnostic maneuver during narrow-complex tachycardia: What is the arrhythmia mechanism? Heart Rhythm. 2009;6:716-717.
http://www.ncbi.nlm.nih.gov/pubmed/19332390

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.
http://www.ncbi.nlm.nih.gov/pubmed/19272064

Hijazi ZM, Shivkumar K, Sahn DJ. Intracardiac echocardiography during interventional and electrophysiological cardiac catheterization. Circulation. 2009;119:587-596.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2761099/

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.
http://www.ncbi.nlm.nih.gov/pubmed/19299784

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.
http://www.ncbi.nlm.nih.gov/pubmed/19963529

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.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2742784/

Shivkumar K, Tung R. Improving our understanding of epicardial ventricular tachycardia in nonischemic cardiomyopathy. J Am Coll Cardiol. 2009;54:809-811.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2742504/

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.
http://www.ncbi.nlm.nih.gov/pubmed/19959144

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.
http://www.ncbi.nlm.nih.gov/pubmed/19168770

Tung R, Shivkumar K. Ripple mapping: Making electroanatomic mapping user-friendly. Heart Rhythm. 2009;6:1763-1764.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2825575/

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.
http://www.ncbi.nlm.nih.gov/pubmed/19324311

2008

Boyle NG, Shivkumar K. Atrial fibrillation and congestive heart failure. Curr Heart Fail Rep. 2008;5:11-15.
http://www.ncbi.nlm.nih.gov/pubmed/19111766

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.
http://www.ncbi.nlm.nih.gov/pubmed/18420651

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.
http://www.ncbi.nlm.nih.gov/pubmed/18783994

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.
http://www.ncbi.nlm.nih.gov/pubmed/18279407

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.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2730563/

Ramirez RJ, Shivkumar K. Latent atrial fibrillation triggers originating in accessory pathways. Heart Rhythm. 2008;5:1248-1249.
http://www.ncbi.nlm.nih.gov/pubmed/18774097

Shivkumar K. Percutaneous epicardial ablation of atrial fibrillation. Heart Rhythm. 2008;5:152-154.
http://www.ncbi.nlm.nih.gov/pubmed/18053771

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.
http://www.ncbi.nlm.nih.gov/pubmed/18407850

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.
http://www.ncbi.nlm.nih.gov/pubmed/18534271

Vaseghi M, Shivkumar K. The role of the autonomic nervous system in sudden cardiac death. Prog Cardiovasc Dis. 2008;50:404-419.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2752648/

2007

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.
http://www.ncbi.nlm.nih.gov/pubmed/17997362

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.
http://www.ncbi.nlm.nih.gov/pubmed/17198999

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.
http://www.ncbi.nlm.nih.gov/pubmed/17905335

Cesario DA, Mahajan A, Shivkumar K. Lesion-forming technologies for catheter ablation of atrial fibrillation. Heart Rhythm. 2007;4:S44-50.
http://www.ncbi.nlm.nih.gov/pubmed/17336884

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.
http://www.ncbi.nlm.nih.gov/pubmed/17976100

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.
http://www.ncbi.nlm.nih.gov/pubmed/17905332

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.
http://www.ncbi.nlm.nih.gov/pubmed/17903630

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.
http://www.ncbi.nlm.nih.gov/pubmed/17223426

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.
http://www.ncbi.nlm.nih.gov/pubmed/17957051

Vaseghi M, Shannon KM, Wetzel GT, Shivkumar K. Reentry around the heart. Heart Rhythm. 2007;4:236-238.
http://www.ncbi.nlm.nih.gov/pubmed/17275765

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.
http://www.ncbi.nlm.nih.gov/pubmed/17218215

2006

Boyle NG, Shivkumar K. Arrhythmia diagnosis: Simple and elegant. Heart Rhythm. 2006;3:680-681.
http://www.ncbi.nlm.nih.gov/pubmed/16731469

Buch E, Cesario DA, Shivkumar K. The autonomic innervation of the ligament of marshall. J Cardiovasc Electrophysiol. 2006;17:600-601.
http://www.ncbi.nlm.nih.gov/pubmed/16836705

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.
http://www.ncbi.nlm.nih.gov/pubmed/16959588

Cesario DA, Shenoda M, Brar R, Shivkumar K. Left ventricular lead stabilization utilizing a coronary stent. Pacing Clin Electrophysiol. 2006;29:427-428.
http://www.ncbi.nlm.nih.gov/pubmed/16650274

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.
http://www.ncbi.nlm.nih.gov/pubmed/16399044

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.
http://www.ncbi.nlm.nih.gov/pubmed/17074631

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.
http://www.ncbi.nlm.nih.gov/pubmed/16836713

2005

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.
http://www.ncbi.nlm.nih.gov/pubmed/16085259

Cesario DA, Broder HJ, Fishbein MC, Shivkumar K. Histopathologic characterization of the atrioventricular conduction axis following catheter ablation. Heart Rhythm. 2005;2:532-535.
http://www.ncbi.nlm.nih.gov/pubmed/15840481

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.
http://www.ncbi.nlm.nih.gov/pubmed/16050831

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.
http://www.ncbi.nlm.nih.gov/pubmed/16360091

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.
http://www.ncbi.nlm.nih.gov/pubmed/15851295

Shivkumar K. Pulmonary-vein cryoisolation versus left-atrial linear cryoablation for atrial fibrillation. Nat Clin Pract Cardiovasc Med. 2005;2:446-447.
http://www.ncbi.nlm.nih.gov/pubmed/16265583

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.
http://www.ncbi.nlm.nih.gov/pubmed/15733176

Vaseghi M, Cesario D, Swerdlow CD, Shivkumar K. Counterclockwise atrial flutter in dextrocardia. Heart Rhythm. 2005;2:673-674.
http://www.ncbi.nlm.nih.gov/pubmed/15922281

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.
http://www.ncbi.nlm.nih.gov/pubmed/16171742

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.
http://www.ncbi.nlm.nih.gov/pubmed/15851349

2004

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.
http://www.ncbi.nlm.nih.gov/pubmed/15851204

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.
http://www.ncbi.nlm.nih.gov/pubmed/15250862

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.
http://www.ncbi.nlm.nih.gov/pubmed/15133362

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.
http://www.ncbi.nlm.nih.gov/pubmed/15028056

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.
http://www.ncbi.nlm.nih.gov/pubmed/16036032

Shivkumar K, N Weiss J. The slippery slope of human ventricular arrhythmias. J Cardiovasc Electrophysiol. 2004;15:1364-1365.
http://www.ncbi.nlm.nih.gov/pubmed/15610279

Shivkumar K, Valderrabano M. Use of potassium channel openers for pharmacologic modulation of cardiac excitability. J Cardiovasc Electrophysiol. 2004;15:821-823.
http://www.ncbi.nlm.nih.gov/pubmed/15250870

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.
http://www.ncbi.nlm.nih.gov/pubmed/14969616

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.
http://www.ncbi.nlm.nih.gov/pubmed/15851176

2003

Swerdlow C, Shivkumar K, Zhang J. Determination of the upper limit of vulnerability using implantable cardioverter-defibrillator electrograms. Circulation. 2003;107:3028-3033.
http://www.ncbi.nlm.nih.gov/pubmed/12810611

2002

Christenson SD, Olshansky B, Shivkumar K. Unusual response to atrial extrastimulus testing. J Cardiovasc Electrophysiol. 2002;13:200.
http://www.ncbi.nlm.nih.gov/pubmed/11900302

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.
http://www.ncbi.nlm.nih.gov/pubmed/11829548

Shivkumar K. Mechanisms of arrhythmias: Are we still "Learning while burning"? (editorial). J Cardiovasc Electrophysiol. 2002;13:393-394.
http://www.ncbi.nlm.nih.gov/pubmed/12033358

Shivkumar K, Murali NS, Krishnan SC. The molecular basis of cardiac arrhythmias. J Nucl Cardiol. 2002;9:206-214.
http://www.ncbi.nlm.nih.gov/pubmed/11986566