Which coronary artery courses through the posterior interventricular groove?

The right coronary artery is responsible for supplying blood to the right ventricle and the inferior wall of the left ventricle. It typically courses through the posterior interventricular groove, also known as the posterior descending artery (PDA), which branches off the right coronary artery in most individuals. This anatomical pathway allows the right coronary artery to provide vital blood flow to the posterior portions of the heart.

In contrast, the left marginal artery, left anterior descending artery, and circumflex artery do not course through the posterior interventricular groove. The left anterior descending artery primarily travels along the anterior interventricular groove, supplying blood to the anterior wall of the heart. The circumflex artery circumferentially supplies the lateral and posterior walls of the left ventricle but does not run through the posterior interventricular groove. The left marginal artery, a branch of the circumflex artery, also does not enter the posterior interventricular groove. Understanding the specific pathways of these coronary arteries is essential for comprehending their roles in cardiac blood supply.