Adult Echocardiography Practice Exam

Where is coarctation of the aorta typically located?

1. Proximal to the origin of the left subclavian artery

2. In the mid descending aorta

3. Distal to the origin of the left subclavian artery

4. Proximal to the origin of the innominate artery

The correct answer is: Distal to the origin of the left subclavian artery

Coarctation of the aorta is most commonly found distal to the left subclavian artery. This is the typical anatomical location for this condition, where there is a narrowing of the aorta that often occurs just after the left subclavian artery branches off. This location is significant because it results in higher blood pressure in the arms and head (which are supplied by arteries that are proximal to the coarctation) and lower blood pressure in the lower part of the body. Understanding this location helps in predicting associated clinical findings and potential complications related to blood flow dynamics. The position of the coarctation can lead to the development of collateral circulation, especially in the presence of significant long-standing obstruction. Thus, recognizing that coarctation often occurs distal to the left subclavian artery provides essential insight into both the cardiovascular implications and the management strategies for patients affected by this condition.