TIMI flow grade
Pronunciation: /ˈtaɪmi/
Also written as: TIMI — Thrombolysis In Myocardial Infarction
A standardized angiographic classification system for assessing coronary blood flow, ranging from 0 (no flow) to 3 (normal flow).
Full Definition
The Thrombolysis In Myocardial Infarction (TIMI) flow grade is a widely used angiographic classification system that categorizes coronary blood flow into four grades: TIMI 0 (no antegrade flow), TIMI 1 (minimal antegrade flow), TIMI 2 (delayed or sluggish antegrade flow), and TIMI 3 (normal antegrade flow). This standardized system allows for consistent assessment of coronary perfusion before and after interventional procedures, particularly in the setting of acute myocardial infarction. TIMI flow grade serves as an important endpoint in clinical trials and correlates with clinical outcomes, with TIMI 3 flow associated with better prognosis and smaller infarct size.
Usage
Usage note: Always specify the grade (0-3); correlates with clinical outcomes in ACS patients.
In Context
- "Pre-intervention angiography showed TIMI 0 flow in the occluded right coronary artery." — Primary PCI procedure report
- "Successful reperfusion was achieved with restoration of TIMI 3 flow following stent deployment." — Interventional cardiology note