What is an ICD? An Implantable Cardioverter Defibrillator (ICD) is a small device that is implanted under the skin below the collarbone, similar to a pacemaker. A defibrillation system continuously monitors the heart's rhythm.
Most defibrillation systems deliver a range of therapies, depending on the type of arrhythmias detected and how the doctor has programmed the device to function. If your heart rate becomes too slow, then, like a pacemaker, most ICDs are capable of pacing the heart to prevent pauses (bradycardia). Should your heart beat too fast, your ICD will stop the ventricular tachycardia by delivering bursts of energy to restore a normal rhythm.
How does an ICD work? A defibrillation system has three parts:
Defibrillator (inside the body) - a device containing a battery and microelectronics Leads (inside the body) - flexible insulated wires that connect the device to the heart Programmer -- a special computer used by a doctor or technician to retrieve information stored in the defibrillator
The defibrillator and the leads work together to:
Sense and detect a rapid heart rhythm (tachyarrhythmia) Deliver one or more therapies until a more normal heart rhythm is restored (mild therapies are often used first followed by stronger therapies) Store data about each episode
Implant procedure The ICD implant procedure usually takes about one hour, and you may be discharged from the hospital after one to two days. Talk with your doctor for complete information about indications, contraindications, warnings, precautions, and potential complications.

Last Updated on: 20.01.2005