Predictors of delayed and no-reflow as recognized with Thrombolysis in Myocardial Infarction [TIMI] flow grade following Primary Percutaneous Coronary Angioplasty
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.
Abstract:
Background: Initial percutaneous coronary interference (PCI) is still connected by a noticeable incidence of suboptimal coronary flow thrombolysis in infarction of myocardial (TIMI). The predictors of slow and no-reflow in cases that supported initial PCI in our institute was searched for and the relationship of these parameters with major adverse cardiovascular effects (MACE) was assessed. Material and Method: 397 patients with AMI displaying in 24 hours of the sign opening were retrospectively enrolled and underwent primary PCI between March 2006 and March 2012. Demographic, clinical, and procedural data were retrieved from our institutional databank. The baseline and post-PCI flow of blood in the revascularized artery was ranked based on the TIMI grading method. The follow-up visits were performed after one, six and twelve month from hospitalization. All the mortalities and complications were recorded within this period for evaluate the MACE. Results: The frequency of diabetes mellitus and renal failure were importantly larger in cases with a TIMI flow of 0-1 (p=0.03 & p=.01, respectively). Similarly, level of serum creatine were importantly larger in cases with a TIMI flow of 0-1. The predictors for TIMI flow included that utilize of Adenosin or Integrilin, diabetes mellitus, POIT, long tubular lesion, and injury at LAD territory. The incidence of MACE was significantly higher in patients with a TIMI flow of 0-1 (P=0.001) and the survival in this subgroup was significantly poorer (Hazard ratio=4.96; P<0.001). Conclusion: A low TIMI flow is accompanied by a poorer survival and a higher MACE and is influenced by some clinical and vascular characteristics.
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