Death, Sudden, Cardiac

It is usually caused by worsening of existing heart disease. The supplied grounding also links sudden cardiac death to coronary heart disease, myocardial infarction, Brugada syndrome, hypertrophic cardiomyopathy, and dilated cardiomyopathy as underlying conditions associated with sudden arrhythmic death.

The immediate mechanism is cardiovascular collapse leading to cardiac arrest and biological death. The literature grounding emphasizes sudden arrhythmic death, particularly ventricular tachycardia or ventricular fibrillation, and notes that vulnerable atherosclerotic plaques can progress rapidly and trigger thrombotic complications.

Risk is increased by underlying structural or electrical heart disease, including coronary heart disease, prior myocardial infarction, Brugada syndrome, hypertrophic cardiomyopathy, and dilated cardiomyopathy. Genetic disease, such as familial cardiomyopathy, and features associated with arrhythmic risk in these disorders are also supported by the grounding.

Management is centered on prevention and risk stratification of the underlying heart disease. The supplied reviews describe treatment with lifestyle advice and drugs, implantable cardioverter-defibrillators for primary prevention in selected high-risk patients, ventricular ablation in some cases, and left cardiac sympathetic denervation for rare primary electrical diseases such as long QT syndrome and catecholaminergic polymorphic ventricular tachycardia.