What is it?
An ICD is a battery-powered device placed under the skin (below your collarbone). It monitors your heart rate and sends electrical pulses to correct arrhythmias (dangerously rapid and chaotic heartbeats). This process is called defibrillation.
Thin wires called “leads” connect the ICD to one or more chambers in your heart. The leads allow the ICD to read the electrical activity in your heart. If the ICD detects an arrhythmia, it can deliver an electric pulse or a shock to help restore a normal heartbeat.