What is an automatic implantable cardioverter defibrillator (AICD)?
An automatic implantable cardioverter defibrillator (AICD) is a small device, similar to a pacemaker, that is implanted under the skin, often in the shoulder area, just under the collarbone. An AICD senses the rate of the heartbeat. When the heart rate exceeds a rate programmed into the device, the AICD delivers a small, electrical shock to the heart to slow the heart rate. Many newer AICDs can also function as a pacemaker by delivering an electrical signal to regulate a heart rate that is too slow or pace out of a rapid rhythm.
