Author: RxPG, Posted on Friday, October 22 @ 10:09:45 IST by RxPG  

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The right coronary artery supplies all of the following parts of the conducting system in the heart except:
1.SA Node.
2.AV Node.
3.AV Bundle.
4.Right bundle branch.


Answer
1.SA Node.

4.Right bundle branch.

Reference
Gray's Anatomy 38^th Edition Page 1510

Fundamentals of Human Anatomy (Regional and Applied) Dr.A.S.Moni - Vol II - Page 37

Snell’s Clinical Anatomy 6^th Edition Page 105

BDC Page 226

Quality
Confusa !!!

Status
High Yield Topic - Arteries

QTDF
Any Anatomy book (and each give their own Answers)

Discussion
Fundamentals of Human Anatomy by Dr.Moni gives the Branches of Right Coronary Artery as follows

1. Branch to SA Node

2. Marginal Artery supplies the anterior and Posterior surfaces of Right Ventricle

3. AV Nodal Artery supplies the AV Node and its Right Branch

4. Post IV Branch – supplies the post 1/3 of IV Septum and the posterior surface of Right and Left Ventricle

5. Branches to Right Atrium

6. Vasavasorum to the Ascending Aorta

The same views are shared by BDC who says that RCA supplies the whole of conducting System of heart except Left Bundle. Then the Answer will be 1.SA Node, which has dual supply

But Snell says that the conducting system is supplied like this