Observation of an Asymptomatic Dissecting Aortic Aneurysm Using Non-Obstructive Angioscopy.

Non-obstructive angioscopy has become a novel method of evaluating atheromatous plaques of the aortic intimal wall. A 77-year-old man with coronary artery disease underwent percutaneous coronary intervention in the left descending artery. We subsequently used non-obstructive angioscopy to identify aortic atheromatous plaques and incidentally diagnosed an aortic dissecting aneurysm. Non-obstructive angioscopy demonstrated a great fissure in severe atheromatous plaques at the entry site of the aortic dissection identified by enhanced computed tomography. This is the first report to describe the aortic intimal findings of an aortic dissecting aneurysm in vivo by using trans-catheter angioscopy.