TIMI Coronary Thrombus Grade 4

**Semantic type:** Qualitative Concept

**Definition:** Large size definite thrombus, with the largest dimension greater than or equal to 2 vessel diameters. (Gibson, C. M., de Lemos, J. A., Murphy, S. A., Marble, S. J., McCabe, C. H., Cannon, C. P., Antman, E. M., Braunwald, E. Combination therapy with abciximab reduces angiographically evident thrombus in acute myocardial infarction: a TIMI 14 substudy Circulation. 2001;103(21):2550-4.)

**Synonyms:** - CORONARY THROMBUS TIMI GRADE 4