pitvariventrikuláris

Pitvariventrikuláris refers to the anatomical and functional relationship between the atria and ventricles of the heart. The atria are the upper chambers of the heart, responsible for receiving blood, while the ventricles are the lower chambers that pump blood out to the body and lungs. The electrical activity of the heart originates in the sinoatrial node, located in the right atrium. This electrical impulse then spreads through the atria, causing them to contract and push blood into the ventricles. The impulse then travels to the atrioventricular (AV) node, situated between the atria and ventricles. The AV node acts as a gatekeeper, delaying the impulse slightly before transmitting it to the ventricles via the bundle of His and Purkinje fibers. This delay is crucial, allowing the atria to fully empty their blood into the ventricles before the ventricles contract. The coordinated contraction of the atria and ventricles, governed by this pitvariventrikuláris conduction system, is essential for efficient blood circulation. Disruptions in this pathway, such as heart block, can lead to various cardiac arrhythmias and compromise the heart's pumping ability. Understanding the pitvariventrikuláris system is fundamental in diagnosing and managing a wide range of heart conditions.