| Recruiting | Cardiac RADIoablation Versus Repeat Catheter Ablation: a Pivotal Randomized Clinical Trial Evaluating Safety a NCT05765175 | Varian, a Siemens Healthineers Company | N/A |
| Withdrawn | Stereotactic Ablative Radiotherapy (SAbR) for Treatment of Ventricular Tachycardia (VT) Refractory Standard In NCT04334811 | University of Texas Southwestern Medical Center | N/A |
| Unknown | Cardiac Arrhythmias at Extreme Altitude NCT05676398 | Insel Gruppe AG, University Hospital Bern | — |
| Completed | Ablation Targets of Scar-related Ventricular Tachycardia Identified by Dynamic Functional Substrate Mapping NCT05086510 | Ain Shams University | N/A |
| Completed | A Study Assessing Arrhythmia Mapping With the Multi-Electrode OPTRELL™ Mapping Catheter NCT04983797 | Biosense Webster, Inc. | N/A |
| Active Not Recruiting | Effectiveness of the EMPOWER™ Modular Pacing System and EMBLEM™ Subcutaneous ICD to Communicate Antitachycardi NCT04798768 | Boston Scientific Corporation | N/A |
| Unknown | Fluoroscopy Reduction or Elimination in CIED Implants NCT04919733 | Université de Sherbrooke | N/A |
| Terminated | Continuation of Antiarrhythmics Following Ventricular Tachycardia Catheter Ablation NCT04208997 | Vanderbilt University Medical Center | Phase 3 |
| Completed | Physical Activity and Ventricular Arrhythmias NCT04070300 | St. Olavs Hospital | N/A |
| Completed | Acute Effect of One Single Bout of High Intensity Exercise on the Tendency for Ventricular Arrhythmia NCT04075253 | St. Olavs Hospital | N/A |
| Unknown | R Wave Sensing After VT Ablation NCT03779165 | University Hospital Sestre Milosrdnice | — |
| Completed | Saline-Enhanced Radiofrequency (SERF) Catheter Ablation for the Treatment of Ventricular Tachycardia NCT02994446 | Thermedical, Inc. | N/A |
| Unknown | International Electrical Storm Registry NCT02882139 | Università Politecnica delle Marche | — |
| Terminated | Comparison of VT Ablation Outcomes Using Remote MAGNETIC Navigation Versus Manual Approach in a Low LVEF Popul NCT02637947 | Stereotaxis | N/A |
| Completed | CyberHeart's Cardiac Arrhythmia Ablation Treatment: Patients With Refractory Ventricular Tachycardia/Fibrillat NCT02661048 | Varian, a Siemens Healthineers Company | N/A |
| Terminated | Optisure Lead Post Approval Study NCT02235545 | Abbott Medical Devices | — |
| Completed | Efficacy and Safety of Epicardial VT Ablation Using Contact Force Irrigated Tip Catheter - Pilot Study NCT02072707 | University of Sao Paulo General Hospital | N/A |
| Unknown | SmartTouch Catheter in Ablation of Ventricular Tachycardia NCT01639365 | Hospital Universitario Virgen de la Arrixaca | — |
| Completed | Ventricular Wall Motion Characterization NCT01629160 | Abbott Medical Devices | — |
| Completed | Effects of Monopolar Electrocautery Use During Surgery on Implanted Cardiac Defibrillators NCT01572246 | Oregon Health and Science University | — |
| Completed | The Leiden Nonischemic Cardiomyopathy Study NCT01940081 | Leiden University Medical Center | — |
| Terminated | Stepwise Approach To sUbstrate Modification for Ventricular Tachycardia NCT01546207 | Vivek Reddy | N/A |
| Completed | Remifentanil Intravenous Patient Controlled Analgesia (IVPCA) for Ablation of Idiopathic Ventricular Tachycard NCT01901575 | NYU Langone Health | Phase 4 |
| Completed | Boston Scientific Post Market Subcutaneous-Implantable Cardioverter Defibrillator (S-ICD) Registry NCT01085435 | Boston Scientific Corporation | — |
| Unknown | Accuracy and Safety Study of the Magnetecs CGCI System for Intracardiac Mapping NCT01222156 | Magnetecs Corporation | Phase 1 / Phase 2 |
| Terminated | Catheter Ablation Versus Amiodarone for Shock Prophylaxis in Defibrillator Patients With Ventricular Tachycard NCT01097330 | Population Health Research Institute | Phase 3 |
| Completed | S-ICD® System IDE Clinical Study NCT01064076 | Boston Scientific Corporation | N/A |
| Terminated | European Health Economic Trial on Home Monitoring in ICD and CRT-D Patients (EuroEco) NCT00776087 | Biotronik SE & Co. KG | N/A |
| Completed | Ajmaline Utilization in the Diagnosis and Treatment of Cardiac Arrhythmias NCT00702117 | Hospital Clinic of Barcelona | Phase 4 |
| Completed | Survival of Patients With Primary Prophylactic ICD Indication NCT00619593 | Biotronik SE & Co. KG | Phase 4 |
| Completed | PAtient NOtifier Feature for Reduction of Anxiety NCT00559559 | Abbott Medical Devices | N/A |
| Terminated | Bispectral Index Monitoring During Testing in the Electrophysiology Lab NCT00749671 | Baystate Medical Center | N/A |
| Completed | Benefits of Implantable Cardioverter Defibrillator Follow-up Using Remote Monitoring NCT00989417 | Biotronik SE & Co. KG | N/A |
| Terminated | Treatment of Ventricular Tachyarrhythmias Refractory To Shock With Beta Blockers: The SHOCK and BLOCK Trial NCT00401882 | David Haines, MD | Phase 2 |
| Completed | A Randomized Trial of Remote Monitoring of Implantable Cardioverter Defibrillators Versus Quarterly Device Int NCT00606567 | Duke University | N/A |
| Withdrawn | The Ability Of The PD2i Cardiac Analyzer To Predict Risk Of Ventricular Tachyarrhythmic Events NCT00510731 | Vicor Technologies, Inc. | — |
| Unknown | Right Ventricular Defibrillation Lead Select Site Study NCT00385749 | Associates in Cardiology, PA | N/A |
| Completed | Automatic External Defibrillation Monitoring in Cardiac Arrest NCT00382928 | Foundation for Atlanta Veterans Education and Research, Inc. | Phase 1 |
| Terminated | OMNI Study--Assessing Therapies in Medtronic Pacemaker, Defibrillator, and Cardiac Resynchronization Therapy D NCT00277524 | Medtronic Cardiac Rhythm and Heart Failure | — |
| Completed | Double Blind Placebo Controlled Dose Ranging Study of the Efficacy and Safety of SSR149744c 100 or 300 mg for NCT00232297 | Sanofi | Phase 2 |
| Completed | ADVANCE-D: Antitachycardia Pacing (ATP) Delivery for Painless Implantable Cardioverter Defibrillator (ICD) The NCT00147277 | Medtronic Cardiac Rhythm and Heart Failure | Phase 4 |
| Completed | ADVANCE CRT - D: Antitachycardia Pacing (ATP) Delivery for Painless Implantable Cardioverter Defibrillator (IC NCT00147290 | Medtronic Cardiac Rhythm and Heart Failure | Phase 4 |
| Completed | PREPARE - Primary Prevention Parameters Evaluation NCT00279279 | Medtronic Cardiac Rhythm and Heart Failure | N/A |
| Completed | SMS: Substrate Modification Study in Patients Getting an Implantable Cardioverter Defibrillator (ICD) NCT00170287 | Medtronic Cardiac Rhythm and Heart Failure | Phase 4 |
| Completed | Fatty Acid Antiarrhythmia Trial (FAAT) NCT00004559 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Antiarrhythmic Effects of N-3 Fatty Acids NCT00004558 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 2 |
| Completed | Safety and Effectiveness of Cardiac Resynchronization Therapy With Defibrillation NCT00387803 | Boston Scientific Corporation | Phase 2 / Phase 3 |
| Completed | Antiarrhythmics Versus Implantable Defibrillators (AVID) NCT00000531 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Multicenter Unsustained Tachycardia Trial (MUSTT) NCT00000480 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Linkage Study of Long QT Syndrome In An Amish Kindred NCT00005250 | National Heart, Lung, and Blood Institute (NHLBI) | — |
| Completed | Electrophysiologic Study Versus Electrocardiographic Monitoring (ESVEM) NCT00000518 | University of Utah | Phase 3 |