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B-type natriuretic peptide as a predictor of ischemia/reperfusion injury immediately after myocardial reperfusion in patients with ST-segment elevation acute myocardial infarction



B-type natriuretic peptide as a predictor of ischemia/reperfusion injury immediately after myocardial reperfusion in patients with ST-segment elevation acute myocardial infarction



European Heart Journal. Acute Cardiovascular Care 5(1): 62-70



In animal models of acute myocardial infarction (AMI), B-type natriuretic peptide (BNP) administered before and during coronary occlusion limits infarct size. However, the relation between plasma BNP levels and ischemia/reperfusion injury remains unclear. 302 patients with ST-segment elevation AMI (STEMI) received emergency percutaneous coronary intervention within six hours from the onset. The patients were divided into two groups according to the plasma BNP level before angiography: group L (n=151), BNP ≤ 32.2 pg/ml; group H (n=151), BNP >32.2 pg/ml. The Selvester QRS-scoring system was used to estimate infarct size. The rate of ischemia/reperfusion injury immediately after reperfusion, defined as reperfusion ventricular arrhythmias (26% vs. 11%, p=0.001) and ST-segment re-elevation (44% vs. 22%, p=0.008), was higher in group L than in group H. Group L had a greater increase in the QRS score during percutaneous coronary intervention (3.55 ± 0.17 vs. 2.09 ± 0.17, p<0.001) and a higher QRS score 1 h after percutaneous coronary intervention (5.77 ± 0.28 vs. 4.51 ± 0.28, p=0.002). On multivariate analysis, plasma BNP levels in the lower 50th percentile were an independent predictor of reperfusion injury (odds ratio, 2.620; p<0.001). The odds ratios of reperfusion injury according to decreasing quartiles of BNP level, as compared with the highest quartile, were 1.536, 3.692 and 4.964, respectively (p trend=0.002). Plasma BNP level before percutaneous coronary intervention may be a predictor of ischemia/reperfusion injury and the resultant extent of myocardial damage. Our findings suggest that high plasma BNP levels might have a clinically important protective effect on ischemic myocardium in patients with STEMI who receive percutaneous coronary intervention.

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Accession: 057277555

Download citation: RISBibTeXText

PMID: 25609593

DOI: 10.1177/2048872615568964


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