Abstract
Background: Does N-Terminal pro-brain natriuretic peptide (NT-proBNP) predict subsequent major adverse cardiovascular and cerebral event (MACCE) in patients received successful percutaneous coronary intervention (PCI) for acute coronary syndrome (ACS) and had normal left ventricular ejection fraction (LVEF)? Methods: 3986 ACS patients were divided into 4 groups based on the quartile (Q) values of peak NT-proBNP measured during hospitalization. All patients were followed for MACCE, a composite of all-cause death, non-fatal myocardial infarction (MI) or stroke, and heart failure requiring hospitalization (HFRH), during a median of 35 months. The incidence of MACCE was compared among Q1-Q4. Receiver operation characteristic curves (ROC) were generated to compare the area under the curve (AUC) for MACCE, cardiovascular (CV) death and HFRH by adding NT-proBNP to the TIMI (thrombolysis in myocardial infarction) risk score.Results: The incidences of MACCE (5.6%, 9.1%, 13.0%, 20.1%, P <0.001), all-cause death (1.0%, 2.5%, 4.1%, 8.4%, P <0.001), non-fatal MI (2.0%,3.4%,4.8%,6.2%, P <0.001) and HFRH (1.5%, 2.3%, 4.1%, 5.9%, P <0.001) were significantly increased from Q1 to Q4, but, not stroke (1.4%, 1.4%, 1.3%, 2.1%, P =0.438). Each median level (337pg/ml) increase in NT-proBNP was significantly and independently associated with increased risk of MACCE (HR 1.02, 95%CI, 1.01-1.03; P <0.001). Compared with TIMI (thrombolysis in myocardial infarction) risk score alone, TIMI+NT-proBNP showed improved AUCs: CV death (0.76 vs. 0.72, P =0.0008), and HFRH (0.68 vs. 0.66, P =0.0017), MACCE (0.70 vs. 0.69, P =0.0012), respectively. Conclusion: NT-proBNP was significantly and independently associated with increased risk of subsequent MACCE in 3 years in ACS patients who received successful PCI and had normal LVEF, and improved the prognosis of major adverse events in addition to the TIMI risk score.