CLINICAL MEDICINE

Detailed explanation-1: -There are two primary coronary arteries, the right coronary artery (RCA) and the left main coronary artery (LMCA). Both of these originate from the root of the aorta. The RCA emerges from the anterior ascending aorta and supplies blood primarily to the right atrium, right ventricle.

Detailed explanation-2: -Right coronary artery (RCA). The right coronary artery supplies blood to the right ventricle, the right atrium, and the SA (sinoatrial) and AV (atrioventricular) nodes, which regulate the heart rhythm.

Detailed explanation-3: -The right coronary artery supplies oxygenated blood to the right atrium, the right ventricle, and the posterior third and inferior end of the interventricular septum. It may also supply 25% to 35% of the left ventricle (LV). There is significant overlap of supply of the coronary arteries.

Detailed explanation-4: -The left coronary artery (LCA) extends along the coronary sulcus and supplies the left portion of the heart. It further branches into the circumflex artery and the anterior interventricular artery (left anterior descending artery).

Detailed explanation-5: -The right coronary artery, and its branches, supply the right atrium, the right ventricle, and also part of the left ventricle. The left coronary artery supplies most of the left ventricle, and part of the left atrium. Occlusions (blockages) of the left coronary artery are more serious than occlusions of the right.