südameaktiivsus

Südameaktiivsus refers to the electrical activity of the heart. This activity generates electrical impulses that spread through the heart muscle, causing it to contract and pump blood. The electrical impulses originate in the sinoatrial (SA) node, often called the heart's natural pacemaker, located in the upper right atrium. From the SA node, the impulse travels through the atria, causing them to contract.

The impulse then reaches the atrioventricular (AV) node, where it is briefly delayed. This delay allows the ventricles to fill completely with blood before they contract. After passing through the AV node, the electrical impulse travels down the bundle of His and Purkinje fibers, which rapidly spread the impulse throughout the ventricles, causing them to contract and pump blood to the lungs and the rest of the body.

Electrocardiography (ECG or EKG) is a non-invasive test that records the electrical activity of the heart. It measures the timing and strength of the electrical signals as they pass through different parts of the heart. An ECG can detect various heart conditions, including arrhythmias (irregular heartbeats), heart attacks, and other abnormalities in the heart's electrical system. Understanding südameaktiivsus is crucial for diagnosing and managing cardiovascular diseases.