主题词：Cardiac electrophysiology and arrhythmias; Heart Failure Treatment and Management; Cardiovascular Function and Risk Factors; Cardiac Ischemia and Reperfusion; Blood Pressure and Hypertension Studies; Lipoproteins and Cardiovascular Health; Atrial Fibrillation Management and Outcomes; Antiplatelet Therapy and Cardiovascular Diseases; Cardiac Imaging and Diagnostics; Acute Myocardial Infarction Research; Heart Rate Variability and Autonomic Control; Cardiac Fibrosis and Remodeling; Diabetes Treatment and Management; Cardiac Arrhythmias and Treatments; Hormonal Regulation and Hypertension; Ion channel regulation and function; Nitric Oxide and Endothelin Effects; Coronary Interventions and Diagnostics; Renin-Angiotensin System Studies; Diabetes, Cardiovascular Risks, and Lipoproteins; Cardiac pacing and defibrillation studies; Cardiac Arrest and Resuscitation; Atherosclerosis and Cardiovascular Diseases; Cardiovascular and exercise physiology; Receptor Mechanisms and Signaling