Predictive Value of NT-proBNP on MACEs After Acute Coronary Syndrome

In patients diagnosed with Acute coronary syndrome (ACS) based on anamnesis, clinical findings, electrocardiogram (ECG), and/or serum high-sensitivity cardiac troponin (hs-cTn) level in the emergency department (ED), blood samples for serum N-terminal pro-B-type natriuretic peptide (NT-proBNP) value was additionally taken during transfer to the coronary intensive care unit, and left ventricular ejection fraction (LVEF) was calculated by echocardiography before percutaneous coronary intervention (PCI). In addition, demographics (age, sex, and smoking status), comorbidities (hypertension, diabetes mellitus \[DM\] and/or coronary artery disease \[CAD\]), initial complaints and diagnoses, vital signs (systolic blood pressure \[SBP\], heart rate \[HR\], and peripheral capillary oxygen saturation \[SpO2\]), laboratory parameters (serum creatinine, C-reactive protein, and hs-cTn), and ACS subtypes (ST-elevation Myocardial infarction \[STEMI\], non-ST-elevation Myocardial infarction \[NSTEMI\], or unstable angina pectoris \[USAP\]) were obtained during admission. GRACE risk score was calculated for each patient on admission using eight variables, including age, SBP, HR, and serum creatinine. At the end of the 6-month follow-up period, LVEF of surviving patients was assessed by control echocardiography. The short-term MACEs (e.g., nonfatal ischemic stroke, nonfatal myocardial infarction, cardiovascular mortality, or ED admission due to heart failure) were recorded.