atrioventricular groove
anatomy
Quick Summary
The atrioventricular groove is a shallow groove on the external surface of the heart that marks the line where the right atrium and right ventricle meet. This groove contains a branch of the right coronary artery, which supplies blood to the heart muscle. There are other grooves on the heart's surface, including the interventricular sulci that separate the ventricles and the groove between the left atrium and ventricle which holds the coronary sinus. These grooves are important anatomical landmarks on the heart's exterior.1
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