主题词：Cardiac Arrhythmias and Treatments; Atrial Fibrillation Management and Outcomes; Cardiac pacing and defibrillation studies; Cardiac electrophysiology and arrhythmias; Cardiovascular Function and Risk Factors; Cardiovascular Syncope and Autonomic Disorders; Cardiac Valve Diseases and Treatments; Mechanical Circulatory Support Devices; ECG Monitoring and Analysis; Cardiac Imaging and Diagnostics; Vascular anomalies and interventions; Pericarditis and Cardiac Tamponade; Cardiac Structural Anomalies and Repair; Coronary Interventions and Diagnostics; Heart Rate Variability and Autonomic Control; Congenital Heart Disease Studies; Cardiomyopathy and Myosin Studies; Venous Thromboembolism Diagnosis and Management; Cardiovascular Effects of Exercise; Cardiovascular Disease and Adiposity; Cardiovascular and Diving-Related Complications; Cardiac tumors and thrombi; Heart Failure Treatment and Management; Neurological disorders and treatments; Microbial Inactivation Methods