aortic dissection n a pathological splitting of the aortic media
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dissecting aneurysm affecting the aorta, usually the thoracic aorta but sometimes the abdominal aorta.
Aortic dissection of the descending thoracic aorta, in a reformatted left anterior oblique view of a contrast-enhanced CT angiogram. The intimal flap originates beyond the left subclavian artery and extends distally well into the abdominal aorta. The true lumen (T) and false lumen (F) are separated by the dark intimal flap (I).
Medical dictionary. 2011.