Which type of aortic dissection is more likely to cause cardiac complications?

Which type of aortic dissection is more likely to cause cardiac complications?

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

Answer: (B)

The key idea is that involvement of the ascending aorta brings the dissection in contact with the heart’s own vessels and valves, so it’s more likely to directly cause cardiac problems. When the ascending aorta is affected, the coronary ostia can be compromised, leading to myocardial ischemia or infarction. The aortic valve can be distorted or incompetent if the aortic root is involved, causing acute aortic regurgitation. There’s also a higher risk of rupture into the pericardial space, causing tamponade, a life-threatening cardiac complication. Dissections that stay in the descending aorta spare the heart more often, so they’re less likely to cause immediate cardiac problems. DeBakey types that involve the ascending aorta share this risk, but the classic association with acute cardiac complications is strongest when the ascending aorta (Stanford Type A) is involved.

The key idea is that involvement of the ascending aorta brings the dissection in contact with the heart’s own vessels and valves, so it’s more likely to directly cause cardiac problems. When the ascending aorta is affected, the coronary ostia can be compromised, leading to myocardial ischemia or infarction. The aortic valve can be distorted or incompetent if the aortic root is involved, causing acute aortic regurgitation. There’s also a higher risk of rupture into the pericardial space, causing tamponade, a life-threatening cardiac complication. Dissections that stay in the descending aorta spare the heart more often, so they’re less likely to cause immediate cardiac problems. DeBakey types that involve the ascending aorta share this risk, but the classic association with acute cardiac complications is strongest when the ascending aorta (Stanford Type A) is involved.