Aortic atherosclerosis (Katz’s classification)
| Grade I | Normal. |
| Grade II | Atherosclerosis: intimal thickening ≥ 3 mm. |
| Grade III | Atherosclerosis: prothruding plaque < 4 mm. |
| Grade IV* | Atherosclerosis: protruding plaque ≥ 4 mm. |
Grade V*
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