Fig. 4

Axial contrast-enhanced computed tomography (CT) showing the change in intramural hematoma (IMH) thickness at the mid-ascending aorta. a-b The day after the occurrence of the catheter-induced aortic dissection, the IMH thickness is noted to decrease from 19 to 4 mm by conservative treatment; c-d However, it gradually increases to 11 mm until the second week. The diameter of the ascending aorta is 50 mm; e-f After 3 months, the IMH thickness has decreased to 2.7 mm. Follow-up CT after 3 years shows complete resolution of the IMH