What is the pace maker of the heart called?

The pacemaker of the heart is called the sinoatrial (SA) node. It is a specialized group of cells located in the right atrium of the heart that generates electrical impulses to regulate the heartbeat. The SA node initiates each heartbeat by sending an electrical signal that causes the heart muscles to contract and pump blood throughout the body. If the SA node is not functioning properly, it can lead to irregular heart rhythms and other cardiac issues.