What are the main causes of sudden death without heart disease?

Sudden death without heart disease may be sudden cardiac death, the main causes include arrhythmia, myocardial infarction, cardiomyopathy, cardiac ion channel disease and other heart diseases. Sudden death without heart disease may be sudden cardiac death, that is, sudden death due to cardiac causes. The main causes of sudden cardiac death include: 1. Arrhythmia: Such as ventricular fibrillation, ventricular tachycardia and other tachyarrhythmias, as well as ventricular pause, atrioventricular block and other slow arrhythmias. 2. Myocardial infarction: Myocardial infarction is caused by coronary atherosclerotic plaque rupture, thrombosis and other reasons leading to myocardial ischemia necrosis, is one of the common causes of sudden cardiac death. 3. Cardiomyopathy: Such as hypertrophic cardiomyopathy, dilated cardiomyopathy, etc., can lead to abnormal myocardial structure and function, increasing the risk of sudden cardiac death. 4. Cardiac ion channel diseases: such as long QT syndrome, Brugada syndrome, etc., can lead to arrhythmia, increasing the risk of sudden cardiac death. 5. Other causes: Such as heart valve disease, myocarditis, pericarditis, etc., may also lead to sudden cardiac death. In short, sudden death without heart disease may be a manifestation of sudden cardiac death, requiring timely cardiopulmonary resuscitation and first aid to improve survival.