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Type A aortic dissection Quiz

By Syed Faaz Ashraf / February 9, 2026

Adult Cardiac
Type A aortic dissection
Type A aortic dissection Quiz

Type A aortic dissection Quiz

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Question 1 of 9

1. Question

Which of the following is true regarding acute type A aortic dissection?

40% of acute type A aortic dissections occur in aortas < 5.0 cm in diameter
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80% of acute type A aortic dissections occur in aortas > 5.5 cm in diameter
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20% of acute type A aortic dissections occur in aortas < 5.0 cm in diameter
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60% of acute type A aortic dissections occur in aortas > 5.5 cm in diameter
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Question 2 of 9

2. Question

20. Sudden death in acute type A aortic dissection can occur due to which of the following:

Acute aortic rupture
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Coronary ischemia
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Acute aortic insufficiency
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All of the above
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Question 3 of 9

3. Question

19. Strong risk factors for aortic dissection include all of the following except:

Hypertension
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Marfan syndrome
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Bicuspid aortic valve
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Atherosclerosis
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Question 4 of 9

4. Question

18. Where is the most common site for intimal tear in acute type A aortic dissection?

Aortic root or ascending aorta
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Aortic arch
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Descending aorta
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All of the above
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Question 5 of 9

5. Question

15. Which of the following is true about femoral cannulation for surgery to repair acute type A aortic dissection?

Its benefits include rapid cannulation to establish access for cardiopulmonary bypass in the event of hemodynamic compromise.
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When a femoral pulse deficit is present, the artery with the stronger pulse becomes the prefered cannulation site.
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The right femoral is more commonly involved by dissection than the left.
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Femoral artery cannulation should not be used in patients with Marfan's syndrome.
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Question 6 of 9

6. Question

14. Which of the following is true regarding acute type A aortic intramural hematoma (IMH) as compared to acute type A aortic dissection?

IMH always results from atheromatous plaque ulceration.
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IMH does not involve an intimal tear.
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IMH always requires surgical intervention.
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IMH innvolves active flow into a false lumen.
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Question 7 of 9

7. Question

13. The false lumen in acute type A aortic dissection can be distinguished from the true lumen by CT angiography based on which of the following features?

A beak sign is present in the false lumen.
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The false lumen is larger than the true lumen in the proximal aorta.
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The false lumen is more centrally located in the aorta than the true lumen.
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The false lumen lacks thrombus.
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Question 8 of 9

8. Question

12. A patient with acute type A aortic dissection has a pulseless right leg. The following is correct:

After dissection repair, the pulse may return.
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After dissection repair, the pulse should be reevaluated.
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An extra-anatomic bypass such a femoro-femoral or axillo-femoral bypass may be required to restore pulsatile flow.
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All of the above
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Question 9 of 9

9. Question

11. Which of the following is true regarding hypothermia duration during circulatory arrest (DHCA) in type A aortic dissection repair?

DHCA can be safely initiated and continue for 40 minutes after electroencephalography (EEG) demonstrates a "flat line."
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DHCA can be safely initiated and continue for 40 minutes after cooling the patient to 18°C.
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A nasopharyngeal or urinary probe should be used to accurately measure the patient's temperature.
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All of the above
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Type A aortic dissection Quiz

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