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Figure 1 Representative X-ray computed tomograms (A and B) and transesophageal echocardiograms at the basal horizontal view (C and D) in proximal aortic dissection and intramural hematoma. ‘Double-channel aorta’ with intimal flap is characteristic in aortic dissection (A and C), whereas crescentic aortic wall thickening without any evidence of flow communication in aortic intramural hematoma (B and D). LA = left atrium; PA = pulmonary artery; RA = right atrium.