The only part of the heart that is responsive to acetylcholine from the vagus nerve, its resting membrane potential is -55mV, leading this area to have greater automaticity.
This anatomic structure lies at the upper end of the crista terminalis near the opening of the superior vena cava, and is supplied by a branch of the right coronary artery. The only part of the heart that is responsive to acetylcholine from the vagus nerve, its resting membrane potential is -55mV, leading this area to have greater automaticity. A major site of action for norepinephrine and beta blockers, FTP, name this primary pacemaker of the heart, located in the right atrium.
This anatomic structure lies at the upper end of the crista terminalis near the opening of the superior vena cava, and is supplied by a branch of the right coronary artery.
sinoatrial node or SA node