- Aortic dissection is a tear in the wall of the aorta
 Classification systems
|Percentage||60 %||10-15 %||25-30 %|
|Type||DeBakey I||DeBakey II||DeBakey III|
|Stanford A||Stanford B|
|Classification of aortic dissection|
- Type A: Involves the ascending aorta (DeBakey types I and II)
- Type B: Does not involve the ascending aorta (DeBakey type III)
- Type I : Involves the ascending aorta, aortic arch, and descending aorta.
- Type II : Confined to the ascending aorta.
- Type III : Confined to the descending aorta distal to the left subclavian artery.
- Stanford type A and DeBakey types I and II are treated surgically.
- Stanford type B and DeBakey type III are treated medically.
 Imaging Findings
 Differentiating true lumen from false lumen
- Beak sign: In the false lumen, there will be an acute angle between the dissection flap and the arterial wall.
- Aortic cobwebs: In the false lumen, there may be fibroelastic bands.
- Size: False lumen is usually larger than the true lumen.
- Diplaced intimal calcification: Usually faces the true lumen.
Patient #1: Contrast enhanced CT demonstrates a Type B aortic dissection
Patient #2: Contrast enhanced CT demonstrates a Type A aortic dissection
 See Also
 External Links
- Dr. Caroline Chiles
- Wikipedia aortic dissection article