electrical conduction system

The heart’s electrical conduction system controls its rhythmic contractions. It starts with the sinoatrial (SA) node, known as the natural pacemaker, which generates electrical signals. These signals spread through specialized pathways to the atrioventricular (AV) node and then to the bundle of His and Purkinje fibers. This sequence ensures the atria contract first, pushing blood into the ventricles, followed by the ventricles contracting to pump blood out of the heart. This electrical system maintains a consistent heartbeat, coordinating the timing of each heartbeat for effective blood circulation throughout the body.