| Not Yet Recruiting | PRE-hospital Cooling to improvE carDiac arrEst Neurological outComEs (PRECEDENCE) NCT07421882 | Singapore General Hospital | N/A |
| Recruiting | Risk of Sudden Cardiac Death in UN Athletes NCT06518252 | Universidad Nacional de Colombia | — |
| Unknown | Is the Perfusion Index an Accurate Predictor of Return of Spontaneus Circulation in Out-of-hospital Cardiac Ar NCT05383885 | Centre Hospitalier Universitaire Saint Pierre | — |
| Recruiting | Cardiac Magnetic Resonance-Clinical Prediction Model-Dilated Cardiomyopathy NCT07527715 | Shandong Provincial Hospital | — |
| Unknown | Monitoring of Arrhythmias in Patients Treated With Antipsychotics NCT04575103 | Herlev and Gentofte Hospital | N/A |
| Active Not Recruiting | An Educational Program to Improve Cardiac Arrest Diagnostic Accuracy of Ambulance Telecommunicators NCT03894059 | Ottawa Hospital Research Institute | — |
| Completed | ASSURE WCD Clinical Evaluation - Conversion Efficacy Study NCT04132466 | Kestra Medical Technologies, Inc. | N/A |
| Completed | Pre-hospital ECMO in Advanced Resuscitation in Patients With Refractory Cardiac Arrest. ( SUB30 ) NCT03700125 | Barts & The London NHS Trust | 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 |
| Completed | Blood Management During ECMO for Cardiac Support NCT03714048 | St Vincent's Hospital, Sydney | — |
| Unknown | Drug-induced Repolarization ECG Changes NCT03642405 | Copenhagen University Hospital at Herlev | — |
| Withdrawn | Clinical Study of the LRS ThermoSuit™ System in Post Arrest Patients With Intravenous Infusion of Magnesium Su NCT00593164 | Life Recovery Systems | Phase 2 |
| Completed | ECPR for Refractory Out-Of-Hospital Cardiac Arrest NCT03065647 | University of Michigan | N/A |
| Completed | Decision Support for Adults Facing Implantable Cardioverter-Defibrillator Pulse Generator Replacement NCT02668900 | Ottawa Heart Institute Research Corporation | N/A |
| Completed | PREVENTION-ACHD Risk Score NCT03957824 | Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) | — |
| Unknown | Sodium Channel Splicing in Heart Failure Trial (SOCS-HEFT) Prospective Study NCT02738749 | Rhode Island Hospital | N/A |
| Completed | Prevention of Serious Adverse Events in Acute Care Hospitals by Afferent Limb and Response Method Intervention NCT01949025 | Universiteit Antwerpen | N/A |
| Unknown | Heart Rate and Cardiovascular Diseases Prognosis in People With Stable Coronary Artery Disease NCT02244853 | University College, London | — |
| Completed | The Effects of Enzymes and Flavonoids on Inflammation and Coagulation After Marathon NCT01916408 | Technical University of Munich | Phase 1 |
| Completed | The Use of Mobile Phones in Out of Hospital Cardiac Arrest to Increase Bystander CPR NCT01789554 | Karolinska Institutet | N/A |
| Completed | An Observational Study to Assess the Risk of Out-of-Hospital Sudden Cardiac Death in Users of Domperidone, Use NCT01907633 | Janssen Research & Development, LLC | — |
| Completed | Impact of Medical Emergency Team and EMS in Tampere University Hospital NCT01214460 | Tampere University Hospital | — |
| Completed | In-hospital Cardiac Arrest - Dynamics and State Transitions NCT00920244 | St. Olavs Hospital | — |
| Completed | Effect of High Dose Fish Oil Supplementation After Recent Heart Attack Using Magnetic Resonance Imaging NCT00729430 | Brigham and Women's Hospital | Phase 3 |
| Completed | Medtronic Genetic Arrhythmia Markers for Early Detection (GAME Study) NCT00664807 | Medtronic Corporate Technologies and New Ventures | — |
| Withdrawn | Analyzing Gene Regions That May Interact With the Effectiveness of High Blood Pressure Drugs NCT00573092 | University of Washington | — |
| Active Not Recruiting | Genomics of Sudden Cardiac Arrest NCT00661128 | University of Washington | — |
| Completed | DISCOVERY: Diagnostic Data and Genetic Polymorphisms in ICD Patients. NCT00478933 | Medtronic Cardiac Rhythm and Heart Failure | N/A |
| Completed | Sympathetic Nerve Activity and an Implantable Cardioverter Defibrillator in Heart Failure Patients NCT00439790 | University Hospital, Toulouse | — |
| Completed | Automatic External Defibrillation Monitoring in Cardiac Arrest NCT00382928 | Foundation for Atlanta Veterans Education and Research, Inc. | Phase 1 |
| Completed | Extracellular Matrix Marker of Arrhythmia Risk (EMMA) NCT00376532 | Thomas Jefferson University | — |
| Terminated | ResQ Trial: Impact of an ITD and Active Compression Decompression CPR on Survival From Out-of-Hospital Cardiac NCT00189423 | Advanced Circulatory Systems | N/A |
| Completed | Medications and the Risk of Sudden Cardiac Death NCT00241800 | Vanderbilt University Medical Center | — |
| Completed | Drug-Induced Sudden Death & Ventricular Arrhythmia NCT00102180 | University of Pennsylvania | — |
| Completed | Genetic Determinants of Sudden Cardiac Death NCT00064558 | Brigham and Women's Hospital | — |
| Recruiting | Prospective Observational Study of the ICD in Sudden Cardiac Death Prevention NCT00733590 | Johns Hopkins University | — |
| Completed | Prognostic Significance of T Wave Alternans NCT00006501 | Columbia University | — |
| Completed | Home Use of Automatic External Defibrillators to Treat Sudden Cardiac Arrest NCT00047411 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Assessment of Noninvasive Methods to Identify Patients at Risk of Serious Arrhythmias After a Heart Attack NCT00399503 | University of Calgary | — |
| Completed | Minnesota Heart Survey - Mortality and Morbidity NCT00006420 | University of Minnesota | — |
| Completed | Public Access Defibrillation (PAD) Community Trial NCT00004560 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Anxiety and Vagal Control of the Heart in Coronary Disease NCT00006311 | National Heart, Lung, and Blood Institute (NHLBI) | — |
| Completed | Sudden Cardiac Death in Heart Failure Trial (SCD-HeFT) NCT00000609 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Novel Hemostatic Cardiac Risk Factors in Framingham NCT00005356 | National Heart, Lung, and Blood Institute (NHLBI) | — |
| Completed | Thrombogenic Factors and Recurrent Coronary Events NCT00005358 | University of Rochester | — |
| Completed | Epidemiology of Long QTand Asian Sudden Death in Sleep NCT00005367 | Utah State University | — |
| Completed | Failure of Chronically Implanted Defibrillator Leads -Incidence and Management NCT00614718 | University Hospital, Basel, Switzerland | — |
| Completed | Coronary Artery Bypass Graft (CABG) Patch Trial NCT00000540 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Antiarrhythmics Versus Implantable Defibrillators (AVID) NCT00000531 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Epidemiology of Cardiotoxicity in Children With Cancer NCT00005418 | National Heart, Lung, and Blood Institute (NHLBI) | — |
| Completed | Multicenter Unsustained Tachycardia Trial (MUSTT) NCT00000480 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Natural History of Coronary Heart Disease NCT00005265 | National Heart, Lung, and Blood Institute (NHLBI) | — |
| Completed | Heart Rate Variability and Sudden Cardiac Death NCT00005235 | Columbia University | — |
| Completed | Incidence of Diabetes and Cardiovascular Disease in Mexican Americans NCT00005205 | The University of Texas Health Science Center at San Antonio | — |
| Completed | Identifying High Risk Patients With Syncope NCT00005202 | National Heart, Lung, and Blood Institute (NHLBI) | — |
| Completed | Cardiac Arrhythmia Suppression Trial (CAST) NCT00000526 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Completed | Diuretics, Hypertension, and Arrhythmias Clinical Trial NCT00000525 | University of California, San Francisco | Phase 3 |
| Completed | Electrophysiologic Study Versus Electrocardiographic Monitoring (ESVEM) NCT00000518 | University of Utah | Phase 3 |
| Completed | Beta-Blocker Heart Attack Trial (BHAT) NCT00000492 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |