The right coronary artery supplies which of the following electrical tissues?

The right coronary artery supplies which of the following electrical tissues?

• A. Left atrium
• B. AV node
• C. Right ventricle
• D. Pulmonary artery

Answer: (B)

The right coronary artery is primarily responsible for supplying blood to various structures in the heart, particularly those on the right side. One of the crucial electrical tissues that it serves is the atrioventricular (AV) node. The AV node plays a vital role in the heart’s electrical conduction system by receiving the impulse from the sinoatrial (SA) node and delaying it before passing it onto the ventricles, allowing for coordinated contraction of the heart.

This supply is important because any ischemia or blockage in the right coronary artery can lead to dysfunction of the AV node, potentially resulting in heart block and other conduction abnormalities. By contrast, the left atrium is predominantly supplied by the left coronary artery; the right ventricle has additional blood supply contributions, but the focus in this context is specifically on the AV node, making that the correct association. Similarly, the pulmonary artery is not directly supplied by coronary arteries, emphasizing the significance of the AV node's reliance on the right coronary artery.