NT-proBNP test results comparable to those of BNP blood test in patients with kidney disease
A large-scale analysis has shown that a blood test previously found useful in diagnosing or ruling out heart failure in emergency room patients remains effective in patients with chronic kidney disease. The study also demonstrates that the test for a marker called NT-proBNP can identify patients at a higher risk for death, independent of kidney dysfunction. The report from investigators at the Massachusetts General Hospital (MGH) will appear in the January 3, 2006 Journal of the American College of Cardiology and is receiving early online release.
"It is well understood that kidney disease reduces the usefulness of testing for both NT-proBNP and a related biomarker called BNP, and the conventional understanding was that NT-proBNP was the more affected of the two," says James Januzzi Jr., MD, of the MGH Cardiology Division, the papers senior author. "However, while kidney disease did lead to higher values of NT-proBNP in our study, what really matters is clinical performance; and at optimal cut-points, no matter how hard we looked, we found the relationship between chronic kidney disease and the diagnostic accuracy of NT-proBNP was no different than that of BNP. Our findings thus directly contradict observations based on smaller, less characterized patient populations."
Sue McGreevey | EurekAlert!
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