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BACKGROUND Primary percutaneous coronary intervention (PCI) has improved outcomes greatly in patients with ST-elevation myocardial acute infarction (STEMI). However, the no-reflow phenomenon significantly reduces its efficacy. MATERIAL AND METHODS In this study, we investigated the value of combining plasma D-dimer level on admission and pre-infarction angina (PIA) in predicting no-reflow phenomenon in STEMI patients after primary PCI. A total of 926 STEMI patients who underwent primary PCI were included. RESULTS The average age was 52.6 years, 617 (66.6%) of them had experienced a PIA, and 435 (47.9%) showed no-reflow phenomenon after primary PCI. Both PIA and plasma D-dimer on admission were independent predictors of no-reflow, with a risk of 0.516 (95% CI: 0.380 to 0.701) and 2.563 (95% CI: 1.910 to 3.439), respectively. Plasma D-dimer level had an area under curve (AUC) of 0.604 (95% CI: 0.568~0.641) in predicting no-reflow phenomenon, and PIA had an AUC of 0.574 (95% CI: 0.537 to 0.611). Importantly, the new signature combining D-dimer level on admission and PIA showed an increased AUC (0.637, 95%CI: 0.601 to 0.673) in predicting the no-reflow phenomenon. Moreover, the patients with high D-dimer level on admission but without PIA had significantly increased ratio of no-reflow phenomenon and in-hospital mortality compared to the other patients (P&lt;0.001 and P=0.041, respectively). CONCLUSIONS Based on these solid results, we conclude that combining plasma D-dimer level on admission and PIA might create a good signature for use in predicting the no-reflow phenomenon after primary PCI in STEMI patients.

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The Value of Pre-Infarction Angina and Plasma D-Dimer in Predicting No-Reflow After Primary Percutaneous Coronary Intervention in ST-Segment Elevation Acute Myocardial Infarction Patients