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a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract

a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract

an implanted electronic device that takes over the function of the natural cardiac pacemaker

an implanted electronic device that takes over the function of the natural cardiac pacemaker

an implanted electronic device that takes over the function of the natural cardiac pacemaker