What is the pacemaker for the coronary arteries called?

Pacemaker. The coronary arteries are blood vessels and do not have a pacemaker. They react as do all other arteries but not to a pacemaking structure like the sinus node for the heart.
Doesn't exist. There is no pacemaker for the coronary arteries. The pacemaker is part of an electrical system of the heart that controls the contraction of the heart. The coronary arteries, like other arteries are simply flexible tubes that respond to pressures of blood flow caused by the contraction of the heart. With an implanted pacemaker, the lead may run through a coronary sinus but the tip is on the heart.