atriális

Atrial refers to anything relating to the atria of the heart. The atria are the two upper chambers of the heart, the right atrium and the left atrium. The right atrium receives deoxygenated blood from the body and pumps it to the right ventricle. The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle.

Conditions affecting the atria include atrial fibrillation, a common type of irregular heartbeat where the atria beat chaotically. Atrial flutter is another type of abnormal heart rhythm originating in the atria, characterized by a rapid, regular atrial rhythm. Atrial septal defects are congenital heart conditions where there is a hole in the wall separating the right and left atria.

The electrical activity of the atria is initiated by the sinoatrial (SA) node, often called the heart's natural pacemaker, located in the right atrium. This electrical impulse then spreads through the atria, causing them to contract and push blood into the ventricles. The atrioventricular (AV) node then transmits this signal to the ventricles, initiating their contraction. Understanding atrial function is crucial in diagnosing and managing various cardiac diseases.