Coronary angiography postprocedural lesion morphology

Feature	Definition
Abrupt closure	Obstruction of contrast flow (TIMI 0 or 1) in a dilated segment with previously documented anterograde flow
Ectesia	A lesion diameter greater than the reference diameter in one or more areas
Luminal irregularities	Arterial contour that has a “sawtooth pattern” consisting of opacification but not fulfilling the criteria for dissection or intracoronary thrombus
Intimal flap	A discrete filling defect in apparent continuity with the arterial wall
Thrombus	Discrete, mobile angiographic filling defect with or without contrast staining
Dissection*
____ A	Small radiolucent area within the lumen of the vessel
____ B	Linear, nonpersisting extravasation of contrast
____ C	Extraluminal, persisting extravasation of contrast
____ D	Spiral-shaped filling defect
____ E	Persistent lumen defect with delayed anterograde flow
____ F	Filling defect accompanied by total coronary occlusion
____ Length	Measure end-to-end for type B through F dissections
____ Staining	Persistence of contrast within the dissection after washout of contrast from the remaining portion of the vessel
Perforation
____ Localized	Extravasation of contrast confined to the pericardial space immediately surrounding the artery and not associated with clinical tamponade
____ Nonlocalized	Extravasation of contrast with a jet not localized to the pericardial space, potentially associated with clinical tamponade
Side branch loss	TIMI 0, 1, or 2 flow in a side branch >1.5 mm in diameter that previously had TIMI 3 flow
Distal embolization	Migration of a filling defect or thrombus to distally occlude the target vessel or one of its branches
Coronary spasm	Transient or permanent narrowing >50% when a <25% stenosis was previously noted