AICD

Automatic implantable cardioverter defibrillator

An Automatic Implantable Cardioverter Defibrillator (AICD) is an advanced device implanted in patients at risk for life-threatening arrhythmias, such as ventricular tachycardia or ventricular fibrillation. It continuously monitors cardiac rhythms and delivers appropriate therapy—either anti-tachycardia pacing or a high-energy shock—to terminate malignant arrhythmias and restore sinus rhythm. The device also functions as a pacemaker when needed, offering bradycardia support. AICDs have become critical in the management of patients with heart failure, ischemic cardiomyopathy, or a history of sudden cardiac arrest, significantly reducing mortality in these populations.

An AICD typically measures about 5–7 cm in length, 4–5 cm in width, and 0.5–1 cm in thickness, weighing around 70–100 grams.