Abstract

MERLO, PABLO et al. Suboptimal Reperfusion in Patients with ST-Segment Elevation Acute Myocardial Infarction Treated with Primary Percutaneous Coronary Intervention: Predictors and Prognostic Value. Rev. argent. cardiol. [online]. 2018, vol.86, n.4, pp.32-42. ISSN 1850-3748.

Background: Although there is evidence that suboptimal reperfusion has short-term prognostic impact in patients with ST-segment elevation acute coronary syndromes, there is little information about its associated factors.

Objectives: The aim of this study was to analyze the factors associated with suboptimal reperfusion in patients with acute ST-segment elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention (PCI). Methods: Patients from the SCAR (Acute Coronary Syndromes in Argentina) registry diagnosed with acute STEMI undergo-ing PCI were included in the study. The association of classical clinical and laboratory variables and the leuko-glycemic index with suboptimal reperfusion was analyzed. Suboptimal reperfusion was defined as post-PCI angiography TIMI III flow with less than 50% ST-segment decrease in the ECG.

Results: Overall, 197 patients (76.4%) out of 258 patients with acute STEMI met the inclusion criteria. Among them, 8.6% (n: 17) had suboptimal reperfusion, with an incidence of in-hospital death of 17.6% (n: 3) versus 1.7% (n: 3) in patients without suboptimal reperfusion (p=0.007). In the univariate analysis, variables associated with suboptimal reperfusion were: diabetes [OR: 3.2 (1.09-9.43) p=0.026], previous revascularization [OR: 5.8 (1.74-19.07) p=0.008], leuko-glycemic index (> 2,159) [OR 3.7 (1.32-10.22) p=0.009], and pain-to-balloon time (>159 minutes) [OR: 6.9 (0.88- 53) p=0.045]. Age >70 years, male sex, high blood pressure, smoking, previous or anterior-wall infarction, and Killip and Kimball 3-4 and TIMI 0-1 flow on admission were not significantly different between patients with or without suboptimal reperfusion. Prior to the analysis, the cutoff point for the leuko-glycemic index associated with suboptimal reperfusion was established at 2,159 points by ROC curve analysis (NPV: 94%), and the pain-to-balloon time at 159 min (NPV: 96%). In logistic regression analysis, only previous revascular-ization [OR: 5.3 (1.53 -18.55)] and leuko-glycemic index [OR: 3.2 (1.11-9.28)] were associated with suboptimal reperfusion.

Conclusions: Suboptimal reperfusion was significantly associated with a higher incidence of in-hospital death, while previous revascularization and the leuko-glycemic index (>2,159) were factors independently associated with suboptimal reperfusion.

Keywords : Reperfusion Injury - ST Elevatíon Myocardíal Infarctíon.

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