In the majority of people, which artery supplies the AV node?

The atrioventricular (AV) node is primarily supplied by the right coronary artery in most individuals, particularly in those with a right-dominant coronary circulation. The right coronary artery branches off the aorta and typically provides blood to the right side of the heart and supplies the AV node through the nodal artery, which arises from it.

Understanding coronary circulation is crucial because of its implications in various cardiac conditions. In right-dominant circulation, which is present in about 70-80% of individuals, the right coronary artery is responsible for supplying blood to critical areas of the heart, including the AV node. Conversely, in left-dominant or balanced circulation variations, the left coronary system may play a role, but such instances are less common.

Thus, recognizing the role of the right coronary artery in supplying the AV node is essential for appreciating heart function and the potential consequences of ischemia or infarction in this region. This knowledge is vital for critical care nurses managing patients with cardiac conditions.