| Recruiting | Effectiveness of Exercise After an ICD NCT03544489 | University of Washington | Phase 2 / Phase 3 |
| Recruiting | Remote Alert Pathway To Optimize CaRe of Cardiac Implantable Electrical Devices NCT06937658 | Beth Israel Deaconess Medical Center | N/A |
| Recruiting | Self-Management Interventions After an ICD Shock NCT06037785 | University of Washington | N/A |
| Recruiting | Investigation of the Audible ICD Alert Tone NCT06388382 | Universitätsklinikum Köln | — |
| Recruiting | END - VT Cohort Study NCT05835791 | Nova Scotia Health Authority | — |
| Completed | Pilot Study of Hypertrophic Cardiomyopathy & Implantable Cardioverter Defibrillator Assessment: (Subcutaneous NCT05938283 | Barts & The London NHS Trust | N/A |
| Active Not Recruiting | Assessment of Combined CCM and ICD Device in HFrEF NCT05855135 | Impulse Dynamics | N/A |
| Unknown | Association of Obesity and Cardiovascular Outcomes in Patients With Implantable Cardioverter-defibrillator (IC NCT05645965 | Ajou University School of Medicine | — |
| Unknown | Shock Testing to Unmask RV Lead and GEnerator Malfunction in ICD Patients: the SURGE-ICD Registry NCT04858672 | Universitätsklinikum Köln | — |
| Enrolling By Invitation | TRAjectories and CLinical ExpeRiences of ICD Therapy Study NCT05116176 | Beth Israel Deaconess Medical Center | — |
| Completed | Ultrasound Guided Axillary Access vs Standard Fluoroscopic Technique for Cardiac Lead Implantation: ZEROFLUORO NCT05101720 | University Hospital of Ferrara | N/A |
| Unknown | Novel ICD Arrhythmia Detection Algorithm NCT04981496 | Imperial College London | — |
| Completed | GAMification to Encourage End-Of-Life Discussions Between ICD Patients and Caregivers NCT04994782 | Debra Moser | N/A |
| Active Not Recruiting | Prognosis Impact of NSVTs After an AMI (TeVeO Study). NCT04765943 | Fundación Instituto de Estudios de Ciencias de la Salud de Castilla y León | — |
| Completed | Advancing Understanding of Transportation Options NCT04141891 | University of Colorado, Denver | N/A |
| Unknown | Post-procedure Antibiotic Prophylaxis for Cardiac Electrical Device Implantation: ABxFREE Study NCT04146883 | National Cheng-Kung University Hospital | N/A |
| Completed | Analysis of Both Sex and Device Specific Factors on Outcomes in Patients with Non-Ischemic Cardiomyopathy NCT03884608 | Biotronik, Inc. | — |
| Active Not Recruiting | Targeted Potassium Levels for Prevention of ICD Therapy NCT03833089 | Rigshospitalet, Denmark | Phase 4 |
| Completed | Global Electrical Heterogeneity and Clinical Outcomes NCT03210883 | Larisa Tereshchenko | — |
| Completed | Assessment of S-ICD Eligibility With 12-Lead ECG NCT03209726 | Larisa Tereshchenko | — |
| Terminated | Plexa ICD Lead Registry NCT03103503 | Biotronik, Inc. | — |
| Completed | A Personalized and Interactive Web-based Health Care Innovation to Advance the Quality of Care NCT02976961 | Susanne Schmidt Pedersen | N/A |
| Active Not Recruiting | Scandinavian Multicenter Study to Advance Risk Stratification in Heart Disease- Ventricular Arrhythmias NCT02864771 | University Hospital, Akershus | — |
| Completed | A Clinical Evaluation of the Durata or Optisure High Voltage Leads and Ellipse VR ICD Undergoing MRI, an IDE S NCT02787291 | Abbott Medical Devices | N/A |
| Terminated | Protego DF4 Post Approval Registry NCT02243696 | Biotronik, Inc. | — |
| Completed | Psychological Intervention modifiEs Outcome of Patients With implAntable Cardioverter dEfibrillator: The PEACE NCT02902458 | Centre Hospitalier Universitaire de Besancon | N/A |
| Completed | Comparative Effectiveness Research to Assess the Use of Primary ProphylacTic Implantable Cardioverter Defibril NCT02064192 | University Medical Center Goettingen | — |
| Completed | The Gulf Implantable Cardioverter-Defibrillator Registry NCT02491853 | Gulf Heart Association | — |
| Unknown | Utilising Lifemap to Investigate Malignant Arrhythmia Therapy NCT02058771 | University Hospitals, Leicester | — |
| Unknown | S-ICD French Cohort Study (HONEST) NCT05302115 | Paris Sudden Death Expertise Center | — |
| Recruiting | French National Registry of Patients With Tetralogy of Fallot and Implantable Cardioverter Defibrillator NCT03837574 | Paris Sudden Death Expertise Center | — |
| Completed | Implantable Cardioverter Defibrillators - Improving Risk Stratification NCT01944514 | University Hospitals, Leicester | — |
| Completed | Sleep and Ventricular Arrhythmias Study NCT02232204 | University of Florida | Phase 2 |
| Completed | Epicardial vs. Transvenous ICDs in Children NCT05349162 | Paris Cardiovascular Research Center (Inserm U970) | — |