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Clinical and procedural predictors of no-reflow phenomenon after primary percutaneous coronary interventions:
Cevat Kirma1, Akin Izgi, Cihan Dundar
1Cardiology, Kartal Kosuyolu Yuksek Ihtisas Education and Research Hospital, Istanbul, Turkey. ckirma@hotmail.com
Insights
Predicting no-reflow phenomenon after primary percutaneous coronary intervention (PCI) in acute myocardial infarction (AMI) is possible using clinical and angiographic factors. Advanced age, delayed reperfusion, low initial flow, long lesion length, and high thrombus burden are key predictors.
Area of Science:
- Cardiology
- Interventional Cardiology
- Acute Myocardial Infarction Management
Background:
- No-reflow phenomenon, defined as Thrombolysis In Myocardial Infarction (TIMI) flow grade < or =2, is a complication of primary percutaneous coronary intervention (PCI) in acute myocardial infarction (AMI).
- Identifying predictors of no-reflow is crucial for optimizing patient outcomes.
Purpose of the Study:
- To identify clinical, angiographic, and procedural factors predicting the no-reflow phenomenon in AMI patients undergoing primary PCI.
Main Methods:
- A series of 382 consecutive AMI patients undergoing primary PCI within 12 hours of symptom onset were analyzed.
- Clinical, angiographic, and procedural data were collected, and patients were categorized based on the presence or absence of no-reflow phenomenon.
- Univariate and multiple logistic regression analyses were performed to identify independent predictors.
Main Results:
- The no-reflow phenomenon occurred in 24.3% of patients.
- Independent predictors identified by logistic regression included advanced age (OR 1.04), delayed reperfusion (OR 1.4), low TIMI flow before PCI (OR 1.1), target lesion length (OR 5.1), and high thrombus burden (OR 1.6).
- Univariate analysis also showed correlations with cut-off type total occlusion and large vessel diameter.
Conclusions:
- Simple clinical, angiographic, and procedural features can predict the occurrence of no-reflow phenomenon after primary PCI.
- Adjunctive pharmacotherapy and/or distal protection devices may be beneficial in selected patients to mitigate this complication.
Background:
The aim of the study was to identify clinical factors, angiographic findings, and procedural features that predict no-reflow phenomenon (Thrombolysis In Myocardial Infarction (TIMI) flow grade < or =2) in patients with acute myocardial infarction (AMI) who undergo primary percutaneous coronary intervention (PCI).
Methods And Results:
A series of 382 consecutive patients with AMI underwent primary PCI within 12 h of symptom onset. Patients with ischemic symptoms continuing for more than 12 h were also included. Clinical, angiographic and procedural data were collected for each subject. Ninety-three (24.3%) of the patients developed no-reflow phenomenon, and their findings were compared with those of the reflow group. Univariate analysis showed that advanced age (>60 years), delayed reperfusion (> or =4 h), low (< or =1) TIMI flow prior to PCI, cut-off type total occlusion, high thrombus burden on baseline angiography, long target lesion (>13.5 mm) and large vessel diameter all correlated with no-reflow (p<0.05 for all). Multiple logistic regression analysis identified that advanced age (odds ratio (OR) 1.04, p=0.001), delayed reperfusion (OR 1.4, p=0.0004), low TIMI flow before primary PCI (OR 1.1, p=0.0002), target lesion length (OR 5.1, p=0.0003) and high thrombus burden (OR 1.6, p=0.03) on angiography as independent predictors of no-reflow phenomenon.
Conclusion:
The occurrence of no-reflow phenomenon after primary PCI can be predicted using simple clinical, angiographic and procedural features. In this selected group of patients, adjunctive pharmacotherapy and/or distal protection device may be of value.