A specific type of pacemaker, called an implantable cardioverter-defibrillator, combines pacemaker and defibrillator functions in a single implantable device. Others, called biventricular pacemakers, have multiple electrodes stimulating different positions within the ventricles (the lower heart chambers) to improve their synchronization.
A specific type of pacemaker, called an implantable cardioverter-defibrillator combines pacemaker and defibrillator functions in a single implantable device Others, called biventricular pacemakers have multiple electrodes stimulating different p,ositions .within the ,ventricles (the lower heart chambers) to improve their synchronization.