The Effect of Balloon Angioplasty on Hypertension in Atherosclerotic Renal-Artery Stenosis
Brigit C. van Jaarsveld, M.D., Pieta Krijnen, M.Sc., Herman Pieterman, M.D., Frans H.M. Derkx, M.D., Jaap Deinum, M.D., Cornelis T. Postma, M.D., Ad Dees, M.D., Arend J.J. Woittiez, M.D., Anton K.M. Bartelink, M.D., Arie J. Man in `t Veld, M.D., Maarten A.D.H. Schalekamp, M.D., for The Dutch Renal Artery Stenosis Intervention Cooperative Study Group
Background Patients with hypertension and renal-artery stenosisare often treated with percutaneous transluminal renal angioplasty.However, the long-term effects of this procedure on blood pressureare not well understood.
Methods We randomly assigned 106 patients with hypertensionwho had atherosclerotic renal-artery stenosis (defined as adecrease in luminal diameter of 50 percent or more) and a serumcreatinine concentration of 2.3 mg per deciliter (200 µmolper liter) or less to undergo percutaneous transluminal renalangioplasty or to receive drug therapy. To be included, patientsalso had to have a diastolic blood pressure of 95 mm Hg or higherdespite treatment with two antihypertensive drugs or an increaseof at least 0.2 mg per deciliter (20 µmol per liter) inthe serum creatinine concentration during treatment with anangiotensin-convertingenzyme inhibitor. Blood pressure,doses of antihypertensive drugs, and renal function were assessedat 3 and 12 months, and patency of the renal artery was assessedat 12 months.
Results At base line, the mean (±SD) systolic and diastolicblood pressures were 179±25 and 104±10 mm Hg,respectively, in the angioplasty group and 180±23 and103±8 mm Hg, respectively, in the drug-therapy group.At three months, the blood pressures were similar in the twogroups (169±28 and 99±12 mm Hg, respectively,in the 56 patients in the angioplasty group and 176±31and 101±14 mm Hg, respectively, in the 50 patients inthe drug-therapy group; P=0.25 for the comparison of systolicpressure and P=0.36 for the comparison of diastolic pressurebetween the two groups); at the time, patients in the angioplastygroup were taking 2.1±1.3 defined daily doses of medicationand those in the drug-therapy group were taking 3.2±1.5daily doses (P<0.001). In the drug-therapy group, 22 patientsunderwent balloon angioplasty after three months because ofpersistent hypertension despite treatment with three or moredrugs or because of a deterioration in renal function. Accordingto intention-to-treat analysis, at 12 months, there were nosignificant differences between the angioplasty and drug-therapygroups in systolic and diastolic blood pressures, daily drugdoses, or renal function.
Conclusions In the treatment of patients with hypertension andrenal-artery stenosis, angioplasty has little advantage overantihypertensive-drug therapy.
Source Information
From the Departments of Internal Medicine (B.C.J., F.H.M.D., J.D., A.J.M.V., M.A.D.H.S.) and Radiology (H.P.), Erasmus University Hospital, Rotterdam; the Center for Clinical Decision Sciences, Department of Public Health, Erasmus University, Rotterdam (P.K.); the Department of Internal Medicine, University Hospital, Nijmegen (C.T.P.); the Department of Internal Medicine, Ikazia Hospital, Rotterdam (A.D.); the Department of Internal Medicine, Twenteborg Hospital, Almelo (A.J.J.W.); and the Department of Internal Medicine, Eemland Hospital, Amersfoort (A.K.M.B.) all in the Netherlands.
Address reprint requests to Dr. van Jaarsveld at Stichting Dianet, Brennerbaan 130, 3524 BN Utrecht, the Netherlands, or at b.v.jaarsveld{at}utr.dianet.nl.
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