Pacemakers, Cardiac, Implantable
Definition : Cardiac pacemakers that provide permanent pacing by implanting the pacemaker pulse generator beneath the skin in a surgically created pocket and positions its electrodes in or on the heart. Implantable pacemakers include a small battery, the electronic circuitry that senses the cardiac activity and/or produces electrical pulses, the leads that conduct the electrical signals to and from the heart, and the electrodes (e.g., myocardial or endocardial) fixed to the heart. Most pacemakers permit noninvasive reprogramming of pacing parameters following implantation (i.e., multiprogrammable pacemakers), and some dynamically increase or decrease their pacing rate in response to patient physiological activity (i.e., rate-modulated or rate-responsive pacemakers). Implantable pacemakers are mostly used in the permanent treatment of slowed heart rhythms (bradycardia), in certain classes of cardiac arrhythmias, and in other irregular heart rhythms that need permanent pacing treatment.
Entry Terms : "Pacemakers, Cardiac, Internal"
UMDC code : 12913