Disorders in the heart's electrical system can lead to arrhythmias, or an abnormal heart rhythm. Some arrhythmias can be life threatening and require an electrical shock to return the heart to a normal rhythm. Patients who are at risk for sudden cardiac death may require an implantable cardiac defibrillator or ICD, which can deliver a life-saving shock if the heart starts to beat too fast or in a chaotic pattern.
The body generates electrical impulses that cause the heart to beat. In some people, those electrical impulses don't happen in a normal pattern, which can cause the heart to beat too slowly, too fast or irregularly. A very fast heartbeat can lead to ventricular tachycardia, a potentially life-threatening condition. In patients who are at risk for ventricular tachycardia, doctors often recommend an implantable cardioverter defibrillator or ICD.
Most patients with an ICD can live a normal, active life. Patients do need to be aware of the types of shocks an ICD delivers and what to do if they experience a shock. There are also some precautions patients should take in order to reduce complications.
