Sandbox/70
< Sandbox
| 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 |