The proximal lesion from an aortic dissection that is more common and dangerous is categorized as which type?

The proximal lesion from an aortic dissection that is more common and dangerous is categorized as which type?

• A. Type I DeBakey
• B. Type II DeBakey
• C. Type III DeBakey
• D. Type A

Answer: (D)

Proximal involvement means the dissection affects the ascending aorta near the heart. In the Stanford classification, that is labeled Type A. This category is the one that carries the highest risk because the ascending aorta is closely related to the heart and great vessels, so dissection here can rapidly cause life-threatening problems: pericardial tamponade from rupture into the pericardial space, acute aortic regurgitation from valve involvement, and coronary artery compromise leading to myocardial infarction. As a result, Type A dissections are typically surgical emergencies. DeBakey types describe the exact extent (I: ascending, arch, and descending; II: ascending only; III: descending), but clinically the proximal/ascending involvement is summarized as Type A, which is why it’s chosen as the correct answer. Distal dissection confined to the descending aorta corresponds to Type B and is the less dangerous, more often medical-management scenario.

Proximal involvement means the dissection affects the ascending aorta near the heart. In the Stanford classification, that is labeled Type A. This category is the one that carries the highest risk because the ascending aorta is closely related to the heart and great vessels, so dissection here can rapidly cause life-threatening problems: pericardial tamponade from rupture into the pericardial space, acute aortic regurgitation from valve involvement, and coronary artery compromise leading to myocardial infarction. As a result, Type A dissections are typically surgical emergencies.

DeBakey types describe the exact extent (I: ascending, arch, and descending; II: ascending only; III: descending), but clinically the proximal/ascending involvement is summarized as Type A, which is why it’s chosen as the correct answer. Distal dissection confined to the descending aorta corresponds to Type B and is the less dangerous, more often medical-management scenario.