| Not Yet Recruiting | RHYthm and Myocardial Function Relationship Evaluation in Heart Diseases NCT07491237 | Fondazione Policlinico Universitario Agostino Gemelli IRCCS | — |
| Recruiting | Radiotherapy vs Catheter Ablation for Ventricular Tachycardia in Structural Heart Disease NCT06360939 | Western Sydney Local Health District | N/A |
| Not Yet Recruiting | Recurrent Ventricular Arrythmias in ICU NCT07033065 | Central Hospital, Nancy, France | — |
| Active Not Recruiting | ASCEND CSP IDE Study NCT06830746 | Abbott Medical Devices | N/A |
| Recruiting | GEAM Study Aims At Assessing the Role of Genetic Testing in Patients with Arrhythmic Myocarditis. NCT06889662 | Scientific Institute San Raffaele | — |
| Active Not Recruiting | Assessment of a Chronically Implanted Parasternally Delivered EV-ICD Lead (ASCEND EV) Study NCT06592001 | AtaCor Medical, Inc. | N/A |
| Not Yet Recruiting | Risk Stratification Value of Biomarkers in Patients With Ventricular Arrhythmias NCT05965375 | First Affiliated Hospital Xi'an Jiaotong University | — |
| Recruiting | POLish Registry of CArdioneuroablation and CArdioneuromodulation NCT07196397 | SABAMED Medical Center Ltd. | — |
| Enrolling By Invitation | Comparing Immune System Suppression to Medication for Unexplained Heart Function and Irregular Heartbeat NCT06635863 | Roderick Tung | Phase 4 |
| Recruiting | Emergency Resuscitative Endovascular Balloon Occlusion of the Aorta in Out of Hospital Cardiac Arrest NCT06071910 | Queen Mary University of London | N/A |
| Recruiting | Arrhythmic Mitral Valve Prolapse Detection Using Long-term Ambulatory Rhythm Monitoring NCT06378996 | Universitaire Ziekenhuizen KU Leuven | N/A |
| Recruiting | Ventricular Catheter Ablation Study (VCAS) NCT06203262 | Field Medical | N/A |
| Recruiting | SBRT for Ventricular Arrhythmia NCT06411392 | Medical University of Graz | N/A |
| Completed | Pilot Study of Hypertrophic Cardiomyopathy & Implantable Cardioverter Defibrillator Assessment: (Subcutaneous NCT05938283 | Barts & The London NHS Trust | N/A |
| Recruiting | Development of an Artificial Intelligence Algorithm to Detect Pathological Repolarization Disorders on the ECG NCT05829993 | Assistance Publique - Hôpitaux de Paris | — |
| Recruiting | CMP-MYTHiC Trial and Registry - CardioMyoPathy With MYocarditis THerapy With Colchicine NCT06158698 | Niguarda Hospital | Phase 3 |
| Unknown | Ventricular Tachycardia Ablation in LVAD Patients NCT06063811 | Universitätsklinikum Köln | — |
| Completed | Sub Chronic Evaluation for ATP With an Extravascular Placed ICD Lead (STEP ICD) Study NCT05791032 | AtaCor Medical, Inc. | N/A |
| Recruiting | Echocardiography-based Motion Integration and Management for Substrate Characterization and STAR Therapy in Ve NCT05964660 | University of Luebeck | — |
| Recruiting | Cardiovascular Multimodality Imaging Study NCT06610019 | Montefiore Medical Center | — |
| Completed | ExtraVascular Implantable Cardioverter Defibrillator (EV ICD) Japan Study NCT07091916 | Medtronic Cardiac Rhythm and Heart Failure | N/A |
| Recruiting | ConTempoRary Cardiac Stimulation in Clinical practicE: lEft, BivEntriculAr, Right, and conDuction System Pacin NCT06324682 | University Hospital of Ferrara | — |
| Recruiting | Bipolar Radio-frequency Ablation After Standard Unipolar Approach - Prospective Registry. NCT05707637 | Centre of Postgraduate Medical Education | — |
| Withdrawn | ExtraVascular Implantable Cardiac Defibrillator Continued Access Study NCT05049720 | Medtronic | N/A |
| Completed | VIVO European Observational Registry NCT04990089 | Catheter Precision. Inc. | — |
| Unknown | GANGlion Stellate Block for Treatment of Electric storRm (GANGSTER Trial) NCT05078684 | Institute for Clinical and Experimental Medicine | Phase 3 |
| Recruiting | The Multicenter Cardiology Monitoring Platform Registry NCT04976348 | Maastricht University Medical Center | — |
| Completed | Safety and Performance of INVICTA Ventricular DF4 LEADS With Active Fixation-(APOLLO) NCT04590144 | MicroPort CRM | N/A |
| Unknown | Preventive VT Substrate Ablation in Ischemic Heart Disease NCT04675073 | Centro Medico Teknon | Phase 3 |
| Completed | Effect of CoVid-19 (CoronaVirusDisease-19) and Exercise on Myocardial Fibrosis and Ventricular Arrhythmias NCT04726150 | University Hospital, Antwerp | — |
| Unknown | Prophylactic Amiodarone for Shockable Cardiac Arrest NCT04845607 | Won Young Kim | Phase 3 |
| Completed | Non-vascular ICD Electrode Configuration Feasibility Study NCT04809701 | Abbott Medical Devices | N/A |
| Completed | Cardiac Rehab Retrospective Review (CR3) NCT04675957 | Medical University of Graz | — |
| Unknown | Innovative Technologies for the Treatment of Pulmonary and Heart Failure NCT05090930 | National Research Center for Cardiac Surgery, Kazakhstan | N/A |
| Completed | Vektor vMap™ Clinical Validation Study NCT04559061 | Vektor Medical | — |
| Completed | Preliminary Research Evaluation for Ambulatory Leadless Electrocardiogram Recorder Trial NCT05357716 | HelpWear Inc. | — |
| Unknown | Safety Assessment for Sotalol Protocol in Outpatient Unit NCT05418036 | University of Sao Paulo General Hospital | Phase 4 |
| Unknown | CMR Based Prediction of Ventricular Tachycardia Events in Healed Myocardial Infarction (DEVELOP-VT) NCT04599439 | Centro Medico Teknon | — |
| Unknown | Better Mechanistic Understanding of and Risk Stratification for Ventricular Tachyarrhythmias Through ECGI NCT04548804 | Maastricht University Medical Center | N/A |
| Unknown | COVIDAR - Arrhythmias in COVID-19 NCT04437901 | Hospital Clinic of Barcelona | — |
| Unknown | Experience From the Italian S-ICD Registry NCT04373876 | Luigi Sacco University Hospital | — |
| Unknown | Prospective Evaluation of Programmed Ventricular Stimulation Before Pulmonary Valve Replacement in Patients Wi NCT04205461 | Paris Cardiovascular Research Center (Inserm U970) | — |
| Active Not Recruiting | Ventricular Arrhythmia After Myocarditis in Sportsman NCT03842592 | University Hospital, Angers | N/A |
| Unknown | Evaluation of Long-term Incidence of Ventricular Arrhythmias in Patients With Acute Myocarditis NCT04264455 | Wuerzburg University Hospital | — |
| Completed | Extravascular ICD Pivotal Study NCT04060680 | Medtronic Cardiac Rhythm and Heart Failure | N/A |
| Completed | Cardiovascular Consequences in Intense and Extended Physical Exercise NCT03972865 | University Hospital, Montpellier | N/A |
| Active Not Recruiting | Magnetocardiography (MCG) Parameters in the Prediction of Future ICD Therapy NCT04352816 | University Hospitals Coventry and Warwickshire NHS Trust | N/A |
| Unknown | Noninvasive Electrocardiographic Imaging for Individuals at Risk for Apparently Idiopathic Ventricular Fibrill NCT03963271 | Maastricht University Medical Center | — |
| Unknown | A Novel Myocardial Impedance Mapping System for Ablation of Post-infarction Ventricular Arrhytmias in Humans NCT04000412 | Fundació Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau | — |
| Completed | Non-Invasive 3D Mapping for Identifying Origin and Preferential Propagation of Ventricular Arrhythmias NCT03831516 | Northwell Health | — |
| Unknown | Safety and Electrical Performance Evaluation of INVICTA Leads Models Equipped With DF4 Connector NCT03766919 | MicroPort CRM | N/A |
| Completed | Sympathetic Denervation by Video-assisted Thoracoscopy in Control of Cardiac Arrhythmias in Patients With Chag NCT04239144 | University of Sao Paulo General Hospital | N/A |
| Completed | Extravascular ICD Pilot Study NCT03608670 | Medtronic Cardiac Rhythm and Heart Failure | N/A |
| Completed | Shock Efficacy Study Comparing Fixed Tilt and Fixed Pulse Width in a General Implantable-Cardioverter Populati NCT03632057 | Abbott Medical Devices | N/A |
| Suspended | Half-normal Saline in Idiopathic Left Ventricular Outflow Tract Arrhythmias Ablation NCT03502499 | Texas Cardiac Arrhythmia Research Foundation | N/A |
| Active Not Recruiting | A Randomised Trial of S-ICD Implantation With and Without Defibrillation Testing NCT03495297 | Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) | N/A |
| Unknown | Real Zero Fluoroscopy Catheter Ablation. NCT03458273 | Medical University of Lublin | — |
| Recruiting | Role of Endomyocardial Biopsy and Aetiology-based Treatment in Patients With Inflammatory Heart Disease in Arr NCT04521790 | Scientific Institute San Raffaele | — |
| Recruiting | China Inherited Ventricular Arrhythmias Registry NCT03880708 | China National Center for Cardiovascular Diseases | — |
| Recruiting | China Structural Ventricular Arrhythmias Registry NCT03821051 | China National Center for Cardiovascular Diseases | — |
| Completed | Intramural Needle Ablation for the Treatment of Refractory Ventricular Arrhythmias NCT03204981 | Vivek Reddy | N/A |
| Completed | Global Electrical Heterogeneity and Clinical Outcomes NCT03210883 | Larisa Tereshchenko | — |
| Completed | Arrhythmias in Post-Myocardial Infarction Patients NCT03231826 | Tampere University | — |
| Withdrawn | Safety and Efficacy of Catheter Ablation of Idiopathic Ventricular Arrhythmias Arising From Cardiac Outflow Tr NCT03258112 | Assiut University | N/A |
| Completed | Sodium-glucose Co-transporter 2 Inhibitors Effects in Failing Heart Patients NCT03977116 | University of Campania Luigi Vanvitelli | Phase 4 |
| Completed | Multicentre Investigation of Novel Electrocardiogram Risk Markers in Ventricular Arrhythmia Prediction NCT03022487 | University of Leicester | — |
| Completed | Improve Sudden Cardiac Arrest Study NCT02099721 | Medtronic Cardiac Rhythm and Heart Failure | N/A |
| Unknown | Zero-fluoroscopic Ablation Versus Conventional Fluoroscopic Ablation for the Treatment of Ventricular Arrhythm NCT03041519 | Tongji Hospital | N/A |
| Completed | Cardiac Complication After Vascular Surgery NCT03188341 | Pomeranian Medical University Szczecin | — |
| Recruiting | French National Registry of Patients With Tetralogy of Fallot and Implantable Cardioverter Defibrillator NCT03837574 | Paris Sudden Death Expertise Center | — |