OBJECTIVE: To explore the dynamic changes in brain natriuretic peptide (BNP) concentration and the diagnostic value of BNP for heart failure at different time points in the early phase of acute myocardial infarction (AMI). METHODS: AMI patients who were admitted in our department between January 1, 2016 and July 31, 2016 and underwent emergency percutaneous coronary intervention (PCI) within 12 h after onset were enrolled in this study. All the patients received bedside examinations of BNP concentration and clinical cardiac function within 1 h after PCI and at 12, 20, 24 and 48 h after the onset of AMI. According to the peak BNP concentration, the patients were divided into high peak BNP group (> 400 pg/mL) and normal peak BNP group (≤400 pg/mL). RESULTS: Seventy patients were enrolled in the study. Within 48 h after AMI onset, BNP concentration variations followed a pattern of an initial increase till reaching the peak concentration at 20 to 24 h, with subsequent gradual decrease. BNP concentrations differed significantly among the indicated time points (χ2=141.7, P < 0.05) except for those between 20 h and 24 h (χ2=0.173, P > 0.05). Compared with those in normal peak BNP group, the patients in high peak BNP group had an older age, a lower BMI, a longer time to perfusion, and a higher likeliness of anterior myocardial infarction and pulmonary infection (P < 0.05). Logistic regression analysis showed that age, BMI and anterior myocardial infarction were independently associated with the increase of peak BNP concentration. ROC curve analysis showed that BNP concentration within 1 h after emergency PCI was unable to diagnose heart failure at that time (P > 0.05), while BNP concentrations at 12, 20, 24 and 48 h after AMI onset had significant diagnostic values for heart failure (P < 0.05) with areas under ROC of 0.860, 0.786, 0.768 and 0.863, and optimal cutoff values of 156.5, 313.7, 240.9 and 285.9 pg/mL, respectively. CONCLUSIONS: BNP concentration increases first and then decreases in the early phase of AMI, and the peak concentration occurs at 20-24 h after the onset. The diagnostic values of BNP concentrations at different time points also vary.
OBJECTIVE: To explore the dynamic changes in brain natriuretic peptide (BNP) concentration and the diagnostic value of BNP for heart failure at different time points in the early phase of acute myocardial infarction (AMI). METHODS: AMI patients who were admitted in our department between January 1, 2016 and July 31, 2016 and underwent emergency percutaneous coronary intervention (PCI) within 12 h after onset were enrolled in this study. All the patients received bedside examinations of BNP concentration and clinical cardiac function within 1 h after PCI and at 12, 20, 24 and 48 h after the onset of AMI. According to the peak BNP concentration, the patients were divided into high peak BNP group (> 400 pg/mL) and normal peak BNP group (≤400 pg/mL). RESULTS: Seventy patients were enrolled in the study. Within 48 h after AMI onset, BNP concentration variations followed a pattern of an initial increase till reaching the peak concentration at 20 to 24 h, with subsequent gradual decrease. BNP concentrations differed significantly among the indicated time points (χ2=141.7, P < 0.05) except for those between 20 h and 24 h (χ2=0.173, P > 0.05). Compared with those in normal peak BNP group, the patients in high peak BNP group had an older age, a lower BMI, a longer time to perfusion, and a higher likeliness of anterior myocardial infarction and pulmonary infection (P < 0.05). Logistic regression analysis showed that age, BMI and anterior myocardial infarction were independently associated with the increase of peak BNP concentration. ROC curve analysis showed that BNP concentration within 1 h after emergency PCI was unable to diagnose heart failure at that time (P > 0.05), while BNP concentrations at 12, 20, 24 and 48 h after AMI onset had significant diagnostic values for heart failure (P < 0.05) with areas under ROC of 0.860, 0.786, 0.768 and 0.863, and optimal cutoff values of 156.5, 313.7, 240.9 and 285.9 pg/mL, respectively. CONCLUSIONS:BNP concentration increases first and then decreases in the early phase of AMI, and the peak concentration occurs at 20-24 h after the onset. The diagnostic values of BNP concentrations at different time points also vary.
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