Question

The right coronary artery arises from which structure?

• A. Right aortic sinus
• B. Left aortic sinus
• C. Posterior coronary sinus
• D. Anterior coronary sinus

Hint:

The right coronary artery comes off the anterior, also called right, sinus of Valsalva.

Answer 1

The Correct Option is A

Step 1: The ascending aorta has three dilatations just above the aortic valve called the aortic sinuses of Valsalva: the right (anterior), the left (left posterior) and the posterior (non-coronary) sinus.
Step 2: The right coronary artery arises from the right aortic sinus, which is also known as the anterior aortic sinus.
Step 3: The left coronary artery arises from the left aortic sinus, also called the left posterior aortic sinus. The posterior or non-coronary sinus gives off no coronary artery.
Step 4: Therefore the right coronary artery arises from the right aortic sinus.