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Revascularization of renal artery stenosis in patients with renal insufficiency.
American Journal of Kidney Diseases 2000 October
The incidence and prevalence of end-stage renal disease (ESRD), particularly in the elderly population, have continued to increase in the United States. It is estimated that 10% to 20% of the elderly patients with ESRD have potentially remediable renal vascular disease. The purpose of the present study is to examine the results of renal artery revascularization in 20 patients aged older than 55 years with chronic renal failure (serum creatinine level >2 mg/dL) with proximal renal artery stenosis (RAS) diagnosed by magnetic resonance angiography (MRA) who underwent surgical or percutaneous revascularization. Patients were followed up closely in the postrevascularization period; renal function was monitored and potential complications of the procedure were carefully noted. Four of the 20 patients developed serious complications, including 3 patients with clinically significant atheroembolic disease and 1 patient with renal artery dissection. Seven patients developed greater than 5% eosinophilia. Five of the 20 patients had a deterioration in renal function 3 to 6 months after the procedure, and only 5 patients had a reduction in serum creatinine concentration 3 to 6 months after the procedure. The present study suggests that in elderly patients with chronic renal failure and proximal RAS, revascularization of renal vessels is associated with a high complication rate, and improvement in renal function occurs in only 25% of the patients. Whether revascularization can slow the rate of progression of renal failure remains uncertain and can only be answered by a large prospective trial.
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