atrioventrikulaarne

Atrioventrikulaarne refers to the relationship or connection between the atria and the ventricles of the heart. The atria are the two upper chambers of the heart, and the ventricles are the two lower chambers. The atrioventricular valves, specifically the tricuspid valve between the right atrium and right ventricle, and the mitral valve (or bicuspid valve) between the left atrium and left ventricle, are crucial structures that ensure unidirectional blood flow from the atria to the ventricles.

In normal cardiac function, electrical impulses originating in the sinoatrial node travel to the atria, causing them to contract and push blood into the ventricles. The impulse then reaches the atrioventricular node, located between the atria and ventricles. Here, there is a brief delay, allowing the ventricles to fill completely before they contract. This coordinated sequence, known as the atrioventricular conduction system, is essential for efficient pumping of blood throughout the body.

Disruptions in the atrioventricular system can lead to various cardiac arrhythmias, such as heart block, where the electrical signal is not properly transmitted from the atria to the ventricles. These conditions can affect the heart's ability to pump blood effectively, potentially causing symptoms like dizziness, shortness of breath, or fatigue. Diagnostic tools like electrocardiograms (ECGs) are used to assess the electrical activity and identify any abnormalities in atrioventricular conduction.