TIMI为(thrombolysis in myocardial infarction)的简写TIMI flow grade是用来评估各种溶血物质(thrombolytic agents)的功效.TIMI分四个等级TIMI grade 0 flow : complete occlusion of the coronary artery;TIMI grade 1 flow : some penetration of the obstruction by contrast material, but no perfusion of the distal coronary bed ;TIMI grade 2 flow : perfusion of the entire coronary artery, but with delayed flow compared to a normal artery;TIMI grade 3 flow : full perfusion with normal flow.