Pacemakers and defibrilators are configured to match an individual patient. Part of that configuration includes what parts of the heart to stimulate. This confi

Pacemakers and defibrilators are configured to match an individual patient. Part of that configuration includes what parts of the heart to stimulate. This configuration may need to change as the patient's condition changes. You also need to be able to turn of the pacemaker entirely to monitor how the heart operates without stimulation. You may need to turn of the defibrilator during certain medical procedures...