Svensson et al proposed a classification system for aortic dissection. It incorporates both morphologic and etiologic factors.
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Type of Aortic Dissection
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Class
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classic (presence of an intimal flap separating true and false lumen)
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1
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medial disruption with intramural hemorrhage/hematoma
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2
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discrete dissection without hemorrhage/hematoma and with eccentric bulge at the tear site
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3
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atherosclerotic plaque rupture with ulceration; often with surrounding hematoma that is typically subadventitial
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4
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traumatic or iatrogenic
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5
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A dissection <= 14 days is considered acute and > 14 days is chronic.
