1. What is a pacemaker?
A pacemaker is an implantable device which is positioned typically underneath your left collarbone. It consists of a battery with a computer circuit connected to one or more pacing electrodes (electrical wires) which attach to your heart.
The battery of the pacemaker is able to generate an electrical impulse which is transmitted to your heart, which leads to a heart contraction, leading to a pulse or heartbeat.