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  • Title: B-type natriuretic peptide levels predict outcome after neonatal cardiac surgery.
    Author: Hsu JH, Keller RL, Chikovani O, Cheng H, Hollander SA, Karl TR, Azakie A, Adatia I, Oishi P, Fineman JR.
    Journal: J Thorac Cardiovasc Surg; 2007 Oct; 134(4):939-45. PubMed ID: 17903511.
    Abstract:
    OBJECTIVES: Neonates undergoing cardiac surgery are at high risk for adverse outcomes. B-type natriuretic peptide is used as a biomarker in patients with cardiac disease, but the predictive value of B-type natriuretic peptide after cardiac surgery in neonates has not been evaluated. Therefore, the objective of this study was to determine the predictive value of perioperative B-type natriuretic peptide levels for postoperative outcomes in neonates undergoing cardiac surgery. METHODS: Plasma B-type natriuretic peptide determinations were made before and 2, 12, and 24 hours after surgery in 36 consecutive neonates. B-type natriuretic peptide levels and changes in perioperative B-type natriuretic peptide were evaluated as predictors of postoperative outcome. RESULTS: B-type natriuretic peptide levels at 24 hours were lower than preoperative levels (24-h/pre B-type natriuretic peptide ratio < 1) in 29 patients (81%) and higher (24-h/pre B-type natriuretic peptide ratio > or = 1) in 7 patients (19%). A 24-hour/pre B-type natriuretic peptide level of 1 or greater was associated with an increased incidence of low cardiac output syndrome (100% vs 34%, P = .002) and fewer ventilator-free days (17 +/- 13 days vs 26 +/- 3 days, P = .002), and predicted the 6-month composite end point of death, an unplanned cardiac operation, or cardiac transplant (57% vs 3%, P = .003). A 24-hour/pre B-type natriuretic peptide level of 1 or greater had a sensitivity of 80% and a specificity of 90% for predicting a poor postoperative outcome (P = .003). CONCLUSION: In neonates undergoing cardiac surgery, an increase in B-type natriuretic peptide 24 hours after surgery predicts poor postoperative outcome.
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