Electrical Activity of the Heart

The electrical activity of the heart is the process that controls the heartbeat. It starts with the sinoatrial (SA) node, the heart's natural pacemaker, which generates electrical signals. These signals travel through the heart, causing the atria to contract and push blood into the ventricles. The signals then reach the atrioventricular (AV) node, which delays them briefly before sending them to the ventricles, ensuring they contract in sync. This coordinated electrical activity allows the heart to pump blood effectively throughout the body, delivering oxygen and nutrients while removing waste.