A, Type 1, multiple radiolucent lumens (arrow) or arterial wall
contrast staining. B, Type 2, diffuse stenosis that can be of
varying severity and length (dissection starting from arrow). C,
Type 3: focal or tubular stenosis (arrow), usually <20 mm in length, that
mimics atherosclerosis. Intracoronary imaging should be performed to confirm the
presence of intramural hematoma or multiple lumens. D, Optical
coherence tomography in type 3 (C) shows intramural hematoma
(asterisk).