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Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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TIMI flow grade 1

Introduction

Synonyms and keywords: TIMI 1, TIMI 1 flow, TIMI 1 flow grade, TFG 1, TFG1

Overview

Overview

TIMI grade 1 flow is defined as penetration without perfusion. Contrast material passes beyond the area of obstruction but fails to opacify the entire coronary bed distal to the obstruction for the duration of the cineangiographic filming sequence.[1] [2] [3]

This category is subdivided into:

  • 1.0: dye minimally leaks past the area of obstruction.
  • 1.5: dye leaks well past the area of obstruction but fails to opacify the entire coronary bed prior to the end of cinefilming. Had cinefilming continued longer, dye may have reached the landmark.
Example

Example

TIMI Flow Grade 1 – Left Anterior Descending Artery
TIMI Flow Grade 1.5 – Left Anterior Descending Artery

Additional Examples

Additional Examples

Click here for other examples of TIMI flow grade 1.

References

References

  1. ↑ Gibson, CM; Ryan, K; Sparano, A; Rizzo, M; Moynihan, J; Kelley, M; Marble, SJ; Dodge, JT; Antman, EM. Methodologic drift in the assessment of TIMI grade 3 flow and its implications with respect to the reporting of angiographic trial results. Am Heart J. 1999;137:1179–1184. PMID 10347349
  2. ↑ Gibson CM, Cannon CP, Daley WL, Dodge JT Jr, Alexander B Jr, Marble SJ, McCabe CH, Raymond L, Fortin T, Poole WK, Braunwald E. TIMI frame count: a quantitative method of assessing coronary artery flow. Circulation. 1996 Mar 1;93(5):879-88. PMID 8598078
  3. ↑ Gibson CM, Murphy S, Menown IB, Sequeira RF, Greene R, Van de Werf F, Schweiger MJ, Ghali M, Frey MJ, Ryan KA, Marble SJ, Giugliano RP, Antman EM, Cannon CP, Braunwald E. Determinants of coronary blood flow after thrombolytic administration. TIMI Study Group. Thrombolysis in Myocardial Infarction. J Am Coll Cardiol. 1999 Nov 1;34(5):1403-12. PMID 10551685

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]