Pacemakers are battery-powered implantable devices that stimulate the heart to contract and thus to pump blood throughout the body.
Pacemakers are put in patients whose own electrical system is not functioning correctly. The pacemaker usually stimulates the SA or AV node (patient’s own ‘spark plug”) to send a message to the pumping chambers of the heart to contract. Some people need to have their heart continually reminded to send of an electrical current to promote the chambers contracting and other patients need to ensure a reminder is sent when needed.
A cardiologist will ensure a pacemaker is programmed and installed correctly. Some procedures can take many hours to ensure they are set correctly. You are usually awake for this procedure although likely to be given medication to help you relax.