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Figure 5c. Acute Stanford type A dissection. (a) Pretreatment DSA image shows dilatation of the ascending aorta and opacification of the true (arrows) and false (*) lumina through a wide entry site. (b) Postprocedure DSA image shows the ascending aorta replaced by an aortic graft. With stent-graft deployment in the descending aorta, only the true lumen is evident. (c) CT scan obtained before treatment shows an intimal flap in the ascending and descending aorta (arrows). The false lumen is dilated; the true lumen is compressed and has a crescentic shape. Note the presence of irregular strands (cobwebs) within the false lumen (*). (d) CT scan obtained 3 months after treatment shows the ascending aorta replaced by a graft and the descending aorta replaced by a stent-graft. The false lumen has regressed until it is no longer apparent.
