JOURNAL ARTICLE

B-type natriuretic peptide as predictor of heart failure in patients with acute ST elevation myocardial infarction, single-vessel disease, and complete revascularization: follow-up study

Sime Manola, Nikola Pavlović, Vjekoslav Radeljić, Diana Delić Brkljacić, Hrvoje Pintarić, Kresimir Stambuk, Nikola Bulj, Matias Trbusić, Tomislav Krcmar, Ljerka Lukinac
Croatian Medical Journal 2009, 50 (5): 449-54
19839068

AIM: To assess the concentration of B-type natriuretic peptide (BNP) as a predictor of heart failure in patients with acute ST elevation myocardial infarction (STEMI) who underwent primary percutaneous coronary intervention (PCI) with successful and complete revascularization.

METHODS: Out of a total of 220 patients with acute STEMI admitted to the Sisters of Mercy University Hospital in the period January 1 to December 31, 2007, only patients with acute STEMI undergoing primary PCI who had single vessel disease and were successfully revascularized were included in the study. Selected patients had no history of myocardial infarction or heart failure and a normal or near-normal left ventricular ejection fraction (> or =50%) assessed by left ventriculography at admission. Only 58 patients met the inclusion criteria for the study. Out of those, 6 patients refused to participate in the study, and another 5 could not be followed up, so a total of 47 patients were evaluated. Blood samples were taken for measurement of BNP levels at admission, 24 hours later, and 7 days later. Patients were followed up for 1 year. The primary outcome was reduction in left ventricular ejection fraction (LVEF) to <50% after 1 year.

RESULTS: Patients who developed echocardiographic signs of reduced systolic function defined as LVEF<50% had significantly higher values of BNP (> or =80 pg/mL) at 24 hours (P=0.001) and 7 days (P=0.020) after STEMI and successful reperfusion. Patients who had BNP levels > or =80 pg/mL after 7 days were 21 times more likely to develop LVEF<50 (odds ratio, 20.8; 95% confidence interval, 2.2-195.2; P=0.008).

CONCLUSION: BNP can be used as a predictor of reduced systolic function in patients with STEMI who underwent successful reperfusion and had normal ejection fraction at admission.

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