kardioverterdefibrillaator

A kardioverterdefibrillaator, often abbreviated as ICD, is an implantable medical device used to treat potentially life-threatening cardiac arrhythmias. These arrhythmias, such as ventricular tachycardia and ventricular fibrillation, can cause the heart to beat too fast or irregularly, leading to a loss of consciousness and potentially sudden cardiac arrest. The ICD continuously monitors the heart's rhythm. If it detects a dangerously fast or chaotic rhythm, it delivers electrical therapy to restore a normal heartbeat.

The therapy can take two forms. A low-energy shock, known as cardioversion, is used for slower, but still abnormal, rhythms. For more rapid and life-threatening arrhythmias, a higher-energy shock, called defibrillation, is delivered. The device consists of a pulse generator, which contains the battery and circuitry, and leads that are implanted within the heart chambers. These leads sense the heart rhythm and transmit electrical pulses. ICDs are typically implanted surgically, often under local anesthesia, with the pulse generator placed in the chest wall. Patients with ICDs may experience a mild sensation when the device delivers therapy. Regular follow-up appointments are necessary to monitor the device's function and battery life.