Debakey III (Stanford B) dissection involves a tear in which part of the aorta?

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Multiple Choice

Debakey III (Stanford B) dissection involves a tear in which part of the aorta?

Explanation:
The key idea is where the intimal tear begins in the aorta. Debakey type III dissections start in the descending thoracic aorta, distal to the left subclavian artery, and can extend downward into the abdominal aorta. In the Stanford system, this is classified as type B, meaning the ascending aorta is not involved. So, a Debakey III (Stanford B) dissection involves the descending aorta. The tear may extend into the abdominal aorta, but the initiating segment is the descending thoracic aorta.

The key idea is where the intimal tear begins in the aorta. Debakey type III dissections start in the descending thoracic aorta, distal to the left subclavian artery, and can extend downward into the abdominal aorta. In the Stanford system, this is classified as type B, meaning the ascending aorta is not involved. So, a Debakey III (Stanford B) dissection involves the descending aorta. The tear may extend into the abdominal aorta, but the initiating segment is the descending thoracic aorta.

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