Harrison's Practice: Aortic Dissection

Aortic Dissection

Classification

Anatomic classification
- DeBakey classification
  - Type I: Dissection involves both ascending and descending aorta.
    - Intimal tear occurs in the ascending aorta but involves the descending aorta as well.
  - Type II: Dissection is limited to the ascending aorta.
  - Type III: Dissection is limited to the descending aorta.
- Stanford classification
  - Type A: Dissection involves the ascending aorta (proximal dissection).
    - Independent of site of tear and distal extension
  - Type B: Dissection is limited to the descending aorta (distal dissection).
From a management standpoint, classification into type A or B is more practical and useful because DeBakey types I and II are managed in a similar manner.
Mechanistic classification
- Svensson classification
  - Class 1: classic dissection with true and false lumen
  - Class 2: intramural hematoma or hemorrhage
  - Class 3: subtle dissection without hematoma
  - Class 4: atherosclerotic penetrating ulcer
  - Class 5: iatrogenic or traumatic dissection

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[ Diagnostic Procedures ]	Classification Last updated: September 20, 2009	[ Treatment Approach ]
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