Predictors of delayed and no-reflow as recognized with Thrombolysis in Myocardial Infarction [TIMI] flow grade

M Bahrehmand1, E Sadeghi2, A Shafiee3

  • 1Department of Cardiology, Kermanshah University of Medical Sciences, Kermanshah, Iran.

Insights

Suboptimal coronary blood flow after percutaneous coronary intervention (PCI) for myocardial infarction is linked to worse outcomes. Predictors include diabetes and renal failure, impacting major adverse cardiovascular events (MACE) and survival.

Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Clinical Research

Background:

  • Suboptimal coronary blood flow, specifically Thrombolysis In Myocardial Infarction (TIMI) flow grades 0-1, remains a concern after primary percutaneous coronary intervention (PCI).
  • Identifying predictors of slow or no-reflow is crucial for improving patient outcomes following acute myocardial infarction (AMI).

Purpose of the Study:

  • To investigate the predictors of suboptimal TIMI flow (grades 0-1) after primary PCI in AMI patients.
  • To assess the relationship between these predictors, TIMI flow grades, and major adverse cardiovascular events (MACE).

Main Methods:

  • Retrospective analysis of 397 AMI patients undergoing primary PCI.
  • Data collection included demographics, clinical details, procedural information, and TIMI flow grading (pre- and post-PCI).
  • MACE and survival were evaluated over a 12-month follow-up period.

Main Results:

  • Diabetes mellitus and renal failure were significantly more frequent in patients with TIMI flow 0-1.
  • Predictors for suboptimal TIMI flow included specific medications (Adenosine, Integrilin), diabetes, POIT, long lesions, and LAD territory injury.
  • Patients with TIMI flow 0-1 experienced significantly higher MACE incidence and poorer survival (Hazard Ratio=4.96).

Conclusions:

  • Low TIMI flow post-PCI is associated with increased MACE and reduced survival.
  • Clinical and vascular characteristics significantly influence TIMI flow outcomes.

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