Dissection distal to the left subclavian artery without ascending involvement corresponds to which DeBakey type?

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Multiple Choice

Dissection distal to the left subclavian artery without ascending involvement corresponds to which DeBakey type?

Explanation:
DeBakey classification is based on where the dissection starts and how far it extends along the aorta. If the tear begins distal to the left subclavian artery and the ascending aorta is not involved, it fits DeBakey type III. The ascending aorta is spared, which distinguishes it from types I and II (which involve the ascending aorta). A dissection starting in the descending thoracic aorta and not reaching the ascending portion is the hallmark of type III. (In many schemes, this corresponds to Stanford type B.)

DeBakey classification is based on where the dissection starts and how far it extends along the aorta. If the tear begins distal to the left subclavian artery and the ascending aorta is not involved, it fits DeBakey type III. The ascending aorta is spared, which distinguishes it from types I and II (which involve the ascending aorta). A dissection starting in the descending thoracic aorta and not reaching the ascending portion is the hallmark of type III. (In many schemes, this corresponds to Stanford type B.)

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