Sudden Cardiac Death (SCD) refers to an unexpected death caused by a loss of heart function, often occurring within an hour of symptoms. It can happen to individuals with or without known heart conditions. Common causes include coronary artery disease, arrhythmias, and cardiomyopathy. SCD is a significant health concern, particularly among older adults and those with risk factors like high blood pressure or diabetes. Immediate medical intervention, such as cardiopulmonary resuscitation (CPR) or the use of an automated external defibrillator (AED), can be crucial in saving a life during such emergencies.