"Strict" Blood Pressure Control and Progression of Renal Disease in Hypertensive Nephrosclerosis

Kidney Int. 1995 Sep;48(3):851-9. doi: 10.1038/ki.1995.361.

Abstract

Hypertensive nephrosclerosis is a progressive renal disease and the leading cause of end-stage renal disease (ESRD) in blacks in the United States. It is generally believed that hypertensive renal injury is responsible for progressive renal failure; however, it is not known whether pharmacologic lowering of blood pressure to any level prevents progression of renal disease. Accordingly, we performed a long-term prospective randomized trial to determine whether "strict" [diastolic blood pressure (DBP) 65 to 80 mm Hg] versus "conventional" (DBP 85 to 95 mm Hg) blood pressure control is associated with a slower rate of decline in glomerular filtration rate. Eighty-seven non-diabetic patients (age 25 to 73; 68 black, 58 male) with long-standing hypertension (DBP > or = 95 mm Hg), chronic renal insufficiency (GFR < or = 70 m/min/1.73 m2) and a normal urine sediment were studied. DBP was pharmacologically lowered to < or = 80 mm Hg (3 of 4 consecutive measurements at 1 to 4 weeks intervals) after which patients were randomized. DBP and GFR (renal clearance of 125I-iothalamate) were measured at baseline, at three months and every six months post-randomization. The rate of decline in GFR (GFR slope, in ml/min/1.73 m2/year), estimated by the method of maximum likelihood in a mixed effects model, was the primary outcome variable. In a secondary analysis, 50% reduction in GFR (or a doubling of serum creatinine) from baseline, ESRD and death were combined.(ABSTRACT TRUNCATED AT 250 WORDS)

Publication types

  • Clinical Trial
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • African Continental Ancestry Group
  • Aged
  • Blood Pressure*
  • Female
  • Follow-Up Studies
  • Glomerular Filtration Rate
  • Humans
  • Hypertension / complications*
  • Hypertension / physiopathology
  • Kidney Failure, Chronic / etiology
  • Male
  • Middle Aged
  • Nephrosclerosis / etiology*
  • Prospective Studies
  • Proteinuria / etiology