Roy Mattathu John, M.B.B.S., Ph.D.

Associate Professor
Faculty Appointments
Associate Professor of Medicine
Ph.D., University of London, London, United KingdomM.R.C.P., Royal College of Physicians, London, United KingdomM.B.B.S., Government Medical Hospital, Chandig, India
Kanagasundram AN, John RM, Stevenson WG. Ventricular tachycardia induced by antitachycardia pacing for ventricular tachycardia: Not so pain-free? [editorial]. Heart Rhythm [print-electronic]. 2019 Apr; 16(4): 551-2. PMID: 30465904, PII: S1547-5271(18)31164-0, DOI: 10.1016/j.hrthm.2018.11.019, ISSN: 1556-3871.

Nakamura T, Schaeffer B, Tanigawa S, Muthalaly RG, John RM, Michaud GF, Tedrow UB, Stevenson WG. Catheter ablation of polymorphic ventricular tachycardia/fibrillation in patients with and without structural heart disease. Heart Rhythm [print-electronic]. 2019 Jan 1/31/2019; PMID: 30710740, PII: S1547-5271(19)30104-3, DOI: 10.1016/j.hrthm.2019.01.032, ISSN: 1556-3871.

Virk SA, Keren A, John RM, Santageli P, Eslick A, Kumar S. Mechanical Circulatory Support During Catheter Ablation of Ventricular Tachycardia: Indications and Options. Heart Lung Circ [print-electronic]. 2019 Jan; 28(1): 134-45. PMID: 30355468, PII: S1443-9506(18)31947-4, DOI: 10.1016/j.hlc.2018.10.006, ISSN: 1444-2892.

Nakamura T, Narui R, Zheng Q, Yarmohammadi H, Tedrow UB, Koplan BA, Michaud GF, Stevenson WG, John RM. Atrioventricular Block During Catheter Ablation for Ventricular Arrhythmias. JACC Clin Electrophysiol [print-electronic]. 2019 Jan; 5(1): 104-12. PMID: 30678774, PII: S2405-500X(18)30824-7, DOI: 10.1016/j.jacep.2018.10.005, ISSN: 2405-5018.

Zheng Q, Maytin M, John RM, Killu AM, Epstein LM. Transvenous lead extraction during uninterrupted warfarin therapy: Feasibility and outcomes. Heart Rhythm [print-electronic]. 2018 Dec; 15(12): 1777-81. PMID: 30010055, PII: S1547-5271(18)30695-7, DOI: 10.1016/j.hrthm.2018.07.018, ISSN: 1556-3871.

John RM, Michaud GF, Stevenson WG. Atrial fibrillation hospitalization, mortality, and therapy. Eur. Heart J. 2018 Nov 11/21/2018; 39(44): 3958-60. PMID: 30329031, PII: 5133619, DOI: 10.1093/eurheartj/ehy622, ISSN: 1522-9645.

John RM, Shinohara ET, Price M, Stevenson WG. Radiotherapy for ablation of ventricular tachycardia: Assessing collateral dosing. Comput. Biol. Med [print-electronic]. 2018 Nov 11/1/2018; 102: 376-80. PMID: 30126615, PII: S0010-4825(18)30230-0, DOI: 10.1016/j.compbiomed.2018.08.010, ISSN: 1879-0534.

Nakamura T, Davogustto GE, Schaeffer B, Tanigawa S, Muthalaly RG, Kanagasundram A, John RM, Michaud GF, Tedrow UB, Stevenson WG. Complications and Anticoagulation Strategies for Percutaneous Epicardial Ablation Procedures. Circ Arrhythm Electrophysiol. 2018 Nov; 11(11): e006714. PMID: 30376734, DOI: 10.1161/CIRCEP.118.006714, ISSN: 1941-3084.

John RM, Stevenson WG. A new impedance-based method to guide RF ablation: Still scratching the surface? [editorial]. J. Cardiovasc. Electrophysiol [print-electronic]. 2018 Sep; 29(9): 1207-9. PMID: 29949216, DOI: 10.1111/jce.13687, ISSN: 1540-8167.

John RM, Kanagasundram AN, Stevenson WG. Substrate Mapping for Functionally Defined Ventricular Re-Entry [editorial]. JACC Clin Electrophysiol. 2018 Aug; 4(8): 1049-51. PMID: 30139486, PII: S2405-500X(18)30401-8, DOI: 10.1016/j.jacep.2018.05.008, ISSN: 2405-5018.

Killu AM, Mehta N, Zheng Q, Sobieszczyk P, Tedrow UB, Stevenson WG, John RM. Endomyocardial biopsy at the time of ablation or device implantation. J Interv Card Electrophysiol [print-electronic]. 2018 Jul; 52(2): 163-9. PMID: 29574594, PII: 10.1007/s10840-018-0358-7, DOI: 10.1007/s10840-018-0358-7, ISSN: 1572-8595.

Muthalaly RG, John RM, Schaeffer B, Tanigawa S, Nakamura T, Kapur S, Zei PC, Epstein LM, Tedrow UB, Michaud GF, Stevenson WG, Koplan BA. Temporal trends in safety and complication rates of catheter ablation for atrial fibrillation. J. Cardiovasc. Electrophysiol [print-electronic]. 2018 Jun; 29(6): 854-60. PMID: 29570900, DOI: 10.1111/jce.13484, ISSN: 1540-8167.

Romero J, Stevenson WG, Fujii A, Kapur S, Baldinger SH, Mehta NK, John RM, Michaud GF, Epstein LM, Koplan BA, Tedrow UB, Kumar S. Impact of Number of Oral Antiarrhythmic Drug Failures Before Referral on Outcomes Following Catheter Ablation of Ventricular Tachycardia. JACC Clin Electrophysiol [print-electronic]. 2018 Jun; 4(6): 810-9. PMID: 29929675, PII: S2405-500X(18)30096-3, DOI: 10.1016/j.jacep.2018.01.016, ISSN: 2405-5018.

Kanagasundram AN, John RM, Stevenson WG. Ventricular Tachycardia Ablation in Patients With Implantable Cardioverter Defibrillators Should No Longer Be a Therapy of Last Resort. Circulation. 2018 May 5/1/2018; 137(18): 1885-7. PMID: 29712693, PII: CIRCULATIONAHA.117.032077, DOI: 10.1161/CIRCULATIONAHA.117.032077, ISSN: 1524-4539.

John RM, Kanagasundram AN, Stevenson WG. Inducibility Conundrum for Ablation of Ventricular Tachycardia: Are We Done Yet? [editorial]. Circ Arrhythm Electrophysiol. 2018 Mar; 11(3): e006246. PMID: 29545364, PII: CIRCEP.118.006246, DOI: 10.1161/CIRCEP.118.006246, ISSN: 1941-3084.

Kim EJ, Davogustto G, Stevenson WG, John RM. Non-invasive Cardiac Radiation for Ablation of Ventricular Tachycardia: a New Therapeutic Paradigm in Electrophysiology. Arrhythm Electrophysiol Rev. 2018 Mar; 7(1): 8-10. PMID: 29636967, PMCID: PMC5889801, DOI: 10.15420/aer.7.1.EO1, ISSN: 2050-3369.

Romero J, Di Biase L, Diaz JC, Quispe R, Du X, Briceno D, Avendano R, Tedrow U, John RM, Michaud GF, Natale A, Stevenson WG, Kumar S. Early Versus Late Referral for Catheter Ablation of Ventricular Tachycardia in Patients With Structural Heart Disease: A Systematic Review and Meta-Analysis of Clinical Outcomes. JACC Clin Electrophysiol [print-electronic]. 2018 Mar; 4(3): 374-82. PMID: 30089564, PII: S2405-500X(17)31250-1, DOI: 10.1016/j.jacep.2017.12.008, ISSN: 2405-5018.

John RM, Stevenson WG. Noninvasive Ablation of Ventricular Tachycardia [editorial]. N. Engl. J. Med. 2017 Dec 12/14/2017; 377(24): 2388-90. PMID: 29236632, DOI: 10.1056/NEJMe1713245, ISSN: 1533-4406.

Fujii A, Nagashima K, Kumar S, Tanigawa S, Baldinger SH, Michaud GF, John RM, Koplan BA, Tokuda M, Inada K, Tedrow UB, Stevenson WG. Significance of Inducible Nonsustained Ventricular Tachycardias After Catheter Ablation for Ventricular Tachycardia in Ischemic Cardiomyopathy. Circ Arrhythm Electrophysiol. 2017 Dec; 10(12): PMID: 29237608, PII: CIRCEP.117.005005, DOI: 10.1161/CIRCEP.117.005005, ISSN: 1941-3084.

Mehta N, Peterson BE, John RM. Acute right ventricular failure complicating catheter ablation for right ventricular tachycardia. HeartRhythm Case Rep. 2017 Dec; 3(12): 568-70. PMID: 29296577, PMCID: PMC5741811, PII: S2214-0271(17)30125-2, DOI: 10.1016/j.hrcr.2017.07.004, ISSN: 2214-0271.

Kumar S, Romero J, Stevenson WG, Foley L, Caulfield R, Fujii A, Tanigawa S, Epstein LM, Koplan BA, Tedrow UB, John RM, Michaud GF. Impact of Lowering Irrigation Flow Rate on Atrial Lesion Formation in Thin Atrial Tissue: Preliminary Observations From Experimental and Clinical Studies. JACC Clin Electrophysiol [print-electronic]. 2017 Oct; 3(10): 1114-25. PMID: 29759494, PII: S2405-500X(17)30708-9, DOI: 10.1016/j.jacep.2017.09.001, ISSN: 2405-5018.

Veeranki SP, Mamudu HM, Zheng S, John RM, Cao Y, Kioko D, Anderson J, Ouma AE. Secondhand smoke exposure among never-smoking youth in 168 countries. J Adolesc Health [print-electronic]. 2015 Feb; 56(2): 167-73. PMID: 25529618, PII: S1054-139X(14)00427-3, DOI: 10.1016/j.jadohealth.2014.09.014, ISSN: 1879-1972.