An implantable defibrillator is a tiny computer, plus a battery, contained in a small titanium metal case that is about the size of a pocket watch. It weighs approximately three ounces. The implantable defibrillator is implanted under your skin just below the collar bone. In addition to the device itself, leads - tiny insulated wires - are implanted for two purposes: to carry information signals from your heart to the heart device, and when necessary, to carry electrical impulses to your heart.

The third part of your implantable device system is a programmer, an external computer located in your doctor’s office or clinic that is used to program the heart device, detect and properly treat your rapid heart rhythm, and retrieve information from your device that will assist your doctor in your treatment.

How an Implantable Defibrillator Works

View a video about
how an Implantable
Defibrillator works

If your heart is beating too fast, the implantable defibrillator may first use small painless electrical signals to correct your heart rate. If the potentially lethal heart rate continues, the implantable defibrillator will deliver a necessary life-saving shock and restore your heart to a more normal rate.

If your heart is beating too slowly, the implantable defibrillator can also act as a pacemaker to return your heart to a normal rhythm. Your implantable defibrillator is programmable so your doctor can make adjustments over time to best suit your condition.

An Implantable Defibrillator Offers Restored Peace of Mind

Living with heart disease can be frightening and for some it means being at risk for dangerously fast and potentially lethal heart rates. Fortunately, an implantable defibrillator can provide protection and life-saving therapy giving you greater peace of mind to live life.

Treatment with an implantable defibrillator is not for everyone. Click on the Important Safety Information link in the left column for additional device information.