Sandbox/70

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