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Influence of Renal Function on the Usefulness of N-Terminal Pro-B-Type Natriuretic Peptide as a Prognostic Cardiac Risk Marker in Patients Undergoing Noncardiac Vascular Surgery

N-terminal pro-B-type natriuretic peptide (NT–pro-BNP) is related to stress-induced myocardial ischemia and/or volume overload, both common in patients with renal dysfunction. This might compromise the prognostic usefulness of NT–pro-BNP in patients with renal impairment before vascular surgery. We...

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Published in:The American journal of cardiology 2008, Vol.101 (1), p.122-126
Main Authors: Goei, Dustin, MD, Schouten, Olaf, MD, Boersma, Eric, PhD, Welten, Gijs M.J.M., MD, Dunkelgrun, Martin, MD, Lindemans, Jan, MD, van Gestel, Yvette R.B.M., MSc, Hoeks, Sanne E., MSc, Bax, Jeroen J., MD, Poldermans, Don, MD, PhD
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Language:English
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Summary:N-terminal pro-B-type natriuretic peptide (NT–pro-BNP) is related to stress-induced myocardial ischemia and/or volume overload, both common in patients with renal dysfunction. This might compromise the prognostic usefulness of NT–pro-BNP in patients with renal impairment before vascular surgery. We assessed the prognostic value of NT–pro-BNP in the entire strata of renal function. In 356 patients (median age 69 years, 77% men), cardiac history, glomerular filtration rate (GFR, ml/min/1.73 m2 ), and NT–pro-BNP level (pg/ml) were assessed preoperatively. Troponin T and electrocardiography were assessed postoperatively on days 1, 3, 7, and 30. The end point was the composite of cardiovascular death, Q-wave myocardial infarction, and troponin T release. Multivariate analysis was used to evaluate the interaction between GFR, NT–pro-BNP and their association with postoperative outcome. Median GFR was 78 ml/min/1.73 m2 and the median concentration of NT–pro-BNP was 197 pg/ml. The end point was reached in 64 patients (18%); cardiac death occurred in 7 (2.0%), Q-wave myocardial infarction in 34 (9.6%), and non–Q-wave myocardial infarction in 23 (6.5%). After adjustment for confounders, NT–pro-BNP levels and GFR remained significantly associated with the end point (p = 0.005). The prognostic value of NT–pro-BNP was most pronounced in patients with GFR ≥90 (odds ratio [OR] 1.18, 95% confidence interval [CI] 0.80 to 1.76) compared with patients with GFR 60 to 89 (OR 1.04, 95% CI 1.002 to 1.07), and with GFR 30 to 59 (OR 1.12, 95% CI 1.03 to 1.21). In patients with GFR
ISSN:0002-9149
1879-1913
DOI:10.1016/j.amjcard.2007.07.058