Physician
Cardiology
Dr. Roy M. John, MD
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Roy M. John, MD works in the field of Cardiology. He went to medical school at University of Kerala Medical College. He received 1 awards: "Fellow (FACC)". Dr. Roy M. John has written publications. He has 67 publications published with PubMed. The lastest paper is: 'Combined use of non-thoracotomy cardioverter defibrillators and endocardial pacemakers.' He accepts all Medicare patients.
Publications
- Impact of general anesthesia on initiation and stability of VT during catheter ablation.
- Anterograde conduction to the His bundle during right ventricular overdrive pacing distinguishes Septal pathway atrioventricular reentry from atypical atrioventricular...
- Surgical Cryoablation for Ventricular Tachyarrhythmia Arising from the Left Ventricular Outflow Tract Region.
- Feasibility, Efficacy, and Safety of Radiofrequency Ablation of Atrial Fibrillation Guided by Monitoring of the Initial Impedance Decrease as a Surrogate of Catheter C...
- Reducing Radiation Exposure in the Electrophysiology Laboratory: It is More Than Just Fluoroscopy Times!
- Ventricular Tachycardia in Cardiac Sarcoidosis: Characterization of Ventricular Substrate and Outcomes of Catheter Ablation.
- Predicting Atrial fibrillation: can we shape the future?
- Catheter ablation for premature ventricular contractions and ventricular tachycardia in patients with Heart failure.
- Avoiding tachycardia alteration or termination during attempted entrainment mapping of Atrial tachycardia after Atrial fibrillation ablation.
- Relation of the unipolar low-voltage penumbra surrounding the endocardial low-voltage scar to ventricular tachycardia circuit sites and ablation outcomes in ischemic c...
- Left Atrial Passive Emptying Function Determined by Cardiac Magnetic Resonance Predicts Atrial Fibrillation Recurrence after Pulmonary Vein Isolation.
- Multicenter experience with extraction of the Riata/Riata ST ICD lead.
- Obesity and sleep apnea are independently associated with adverse left ventricular remodeling and clinical outcome in patients with Atrial fibrillation and preserved v...
- Myocardial Extracellular Volume Expansion and the Risk of Recurrent Atrial Fibrillation After Pulmonary Vein Isolation.
- Characterization of Warm Saline-Enhanced Radiofrequency Ablation Lesions in the Infarcted Porcine Ventricular Myocardium.
- Initial impedance decrease as an indicator of good catheter contact: insights from radiofrequency ablation with force sensing catheters.
- The Incidence, Pattern, and Prognostic value of Left Ventricular Myocardial Scar by Late Gadolinium Enhancement in Patients with Atrial Fibrillation.
- Electrocardiographic left ventricular scar burden predicts clinical outcomes following infarct-related VT ablation.
- Superior vena cava defibrillator coils make transvenous lead extraction more challenging and riskier.
- Ventricular Arrhythmias and sudden cardiac death.
- Lead Implant Duration Does Not Always Predict Ease of Extraction: Extraction Sheath May Be Required at < 1 Year.
- Ventricular Arrhythmias in patients with implanted defibrillators.
- TransCoronary Ethanol Ablation for Recurrent Ventricular Tachycardia After Failed Catheter Ablation: An Update.
- InterAtrial electrical dissociation after catheter-based ablation for Atrial fibrillation and flutter.
- Outcomes of Cardiac Perforation Complicating Catheter Ablation of Ventricular Arrhythmias.
- Catheter-based Ablation for Ventricular Arrhythmias.
- Incidence and Predictors of Major Complications from Contemporary Catheter Ablation to treat Cardiac Arrhythmias.
- Percent Biventricular Pacing in Cardiac Resynchronization Therapy: Is More Always Better?
- Effect of therapeutic INR on activated clotting times, heparin dosage, and bleeding risk during ablation of Atrial fibrillation.
- Disseminated malignancies masquerading as cardiovascular implantable electronic devices infections.
- Management and outcomes of cardiac tamponade during Atrial fibrillation ablation in the presence of therapeutic anticoagulation with warfarin.
- Substrate characterization and catheter ablation for monomorphic ventricular tachycardia in patients with apical hypertrophic Cardiomyopathy.
- Resetting criteria during ventricular overdrive pacing successfully differentiate orthodromic reentrant tachycardia from atrioventricular nodal reentrant tachycardia d...
- Prerenal Failure and response to cardiac resynchronization therapy: making a case for the sicker patients deriving greater benefit?
- Multicenter experience with extraction of the Sprint Fidelis implantable cardioverter-defibrillator lead.
- Percutaneous access of the epicardial space for mapping ventricular and supraventricular Arrhythmias in patients with and without prior cardiac surgery.
- Repetitive narrow-complex tachycardia: what is the mechanism?
- Analysis of pacing/defibrillator lead Failure using device diagnostics and pacing maneuvers.
- Fibrillation in the superior vena cava mimicking Atrial tachycardia.
- Strategy to eliminate inappropriate shocks secondary to T-wave oversensing in a biventricular ICD.
- Regularly irregular narrow complex tachycardia: what is the mechanism?
- Sudden Cardiac Death.
- Atrial fibrillation: nonpharmacologic therapies coming of age.
- Inappropriate sensing of pectoral myopotentials by an implantable cardioverter defibrillator system.
- Endocardial pacemaker or defibrillator leads with infected vegetations: a single-center experience and consequences of transvenous extraction.
- Potentiation of Atrial contractility by paired pacing augments ventricular preload and systolic performance.
- Prolonged suction drainage prevents serous wound discharge after cardiac surgery.
- Aortic root complications of infective endocarditis--influence on surgical outcome.
- Predictors of fracture in the Accufix Atrial "J" lead.
- Direct effect of dobutamine on action potential duration in ischemic compared with normal areas in the human ventricle.
- Circadian variation in deFibrillation energy requirements.
- Endocardial monophasic action potential recordings for the detection of myocardial ischemia in man: a study using Atrial pacing stress and myocardial perfusion scintig...
- Quality of Life with Atrial Fibrillation: Do the Spouses Suffer as Much as the Patients?
- Combined use of non-thoracotomy cardioverter defibrillators and endocardial pacemakers.
- The class III antiarrhythmic effect of sotalol exerts a reverse use-dependent positive inotropic effect in the intact canine Heart.
- Managing asymptomatic patients with Chronic mitral regurgitation.
- Performance of a new cardiac cryoablation system in the treatment of cavotricuspid Valve isthmus-dependent atrial flutter.
- Images in Cardiovascular Medicine: Solitary fatty infiltration within the left ventricle detected by cardiac magnetic resonance imaging in a patient presenting with ve...
- Percutaneous pulmonary vein isolation for Atrial fibrillation ablation.
- Effectiveness of early implantation of cardioverter defibrillator for postoperative ventricular tachyarrhythmia.
- Undersensing of ventricular Fibrillation in a noncommitted nonthoracotomy cardioverter defibrillator system.
- Short AV response to Atrial extrastimuli during narrow complex tachycardia: what is the mechanism?
- Percutaneous treatment of superior vena cava obstruction following transvenous device implantation.
- Unusual response to a premature ventricular complex introduced during an episode of paroxysmal supraventricular tachycardia: what is the mechanism?
- Misleading long post-pacing interval after entrainment of typical Atrial flutter from the cavotricuspid isthmus.
- Electrophysiologic assessment of conduction abnormalities and atrial Arrhythmias associated with amyloid cardiomyopathy.
Schools
Trivandrum Med College University Of Kerala
Med College Hospital India
Pinderfields Hospital England
Brigham and Women39s Hospital
Middlesex And University College Hospital
Pilgrim Hospital England
Procedures Preformed
- Ablation for Treatment of Cardiac Arrhythmias
- Automatic Implantable Cardioverter Defibrillator (ICD) Implantation
- Cardiac Catheterization (incl. Coronary Angiography)
- Cardiac Imaging
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Conditions Treated
- Aneurysm and Dissection of Heart
- Angina and Acute Coronary Syndrome
- Aortic Aneurysm
- Aortic Valve Disease
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Doctors Specialties
- Cardiology
- Clinical Cardiac Electrophysiology
Accepted Insurances
Awards
- Fellow (FACC)
Education
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University of Kerala Medical College
Hospital
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Brigham and Women's Hospital
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