BMJ 1994;309:833-837 (1 October)

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Randomised controlled trial of enalapril and ß blockers in non- diabetic chronic renal failure

T Hannedouche, P Landais, B Goldfarb, N El Esper, A Fournier, M Godin, D Durand, J Chanard, F Mignon, J-M Suc, J-P Grunfeld 

Department of Nephrology, Hopital Necker, Paris, France Laboratoires de Biostatistique, Hopital Necker, Paris, France Department of Nephrology, Hopital Sud, Amiens, France Hopital de Bois-Guillaume, Rouen, France Hopital de Rangueil, Toulouse, France, Hopital Maison-Blanche, Reims, France Hopital Teron, Paris, France Correspondence to: Professor T Hannedouche, Department of Nephrology, Hopitaux Universitaires de Strasbourg, 67091, Strasbourg, France.

Abstract

Objective : To compare the ability of angiotensin converting enzyme inhibitors and ß blockers to slow the development of end stage renal failure in non-diabetic patients with chronic renal failure.
Design : Open randomised multicentre trial with three year follow up.
Setting : Outpatient departments of six French hospitals.
Patients : 100 hypertensive patients with chronic renal failure (initial serum creatinine 200-400 µmol/l). 52 randomised to enalapril and 48 to ß blockers (conventional treatment).
Interventions : Enalapril or ß blocker was combined with frusemide and, if necessary, a calcium blocker or centrally acting drug in patients whose diastolic pressure remained above 90 mm Hg.
Results : 17 patients receiving conventional treatment and 10 receiving enalapril developed end stage renal failure. The cumulative renal survival rate was significantly better in the enalapril group than in the conventional group (P<0.05). The slope of the reciprocal serum creatinine concentration was steeper in the conventionally treated patients (- 6.89x10-5l/µmol/month) than in the enalapril group (-4.17x10-5l/µmol/month; P<0.05). No difference in blood pressure was found between groups.
Conclusion : In hypertensive patients with chronic renal failure enalapril slows progression towards end stage renal failure compared with ß blockers. This effect was probably not mediated through controlling blood pressure.

Clinical implications

  • Clinical implications

  • Most patients with chronic renal disease progress to end stage renal disease and require dialysis or renal transplantation

  • Progression of chronic renal disease is aggravated by hypertension

  • This study shows that an angiotensin converting enzyme inhibitor is more effective than ß blockers at slowing progression of non- diabetic chronic renal failure

  • Studies of the effect of angiotensin converting enzyme inhibitors in other renal disease are needed


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