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Keeping blood pressure in check may benefit some African-Americans with kidney disease
Date:10/6/2010

DALLAS Oct. 7, 2010 Keeping blood pressure at a low level in African-Americans with kidney disease may slow the progression of the condition in patients with proteinuria, UT Southwestern Medical Center researchers found in a national study published in The New England Journal of Medicine.

In the African-American Study of Kidney Disease and Hypertension, or AASK, trial of 1,094 patients, researchers found that keeping blood pressure readings at about 130/80 mm Hg reduced the risk of disease progression by 27 percent for patients with protein in the urine (proteinuria), which can be a marker for kidney disease. Intensive lowering of blood pressure in all African-Americans with hypertension and kidney disease, however, did not slow disease progression during four years of follow-up.

Overall, lower blood pressure levels had no effect on disease progression to dialysis, kidney transplantation or death when those with and without proteinuria were included.

"We were surprised by the study's finding that more intensive lowering of blood pressure initially did not improve outcomes for most patients," said Dr. Robert Toto, professor of internal medicine and clinical sciences at UT Southwestern and an author of the study. "During the cohort study all patients had their blood pressure lowered to less than 130/80 mm Hg, and we found that those with proteinuria who were assigned to more aggressive blood pressure control during the trial fared better in the long run. We are very proud of the fact that we were able to extend the results of the trial and learn more about progression of kidney disease in this population.

"Doctors should think about the long-term effects reported in this new study and consider whether it is appropriate to control blood pressure more aggressively in African-American patients with chronic kidney disease who have protein in their urine, and not target all kidney disease patients with a lower blood pressur
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Contact: LaKisha Ladson
lakisha.ladson@utsouthwestern.edu
214-648-3404
UT Southwestern Medical Center
Source:Eurekalert

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