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Journal Article
Research Support, Non-U.S. Gov't
Long-term results after percutaneous transluminal angioplasty of atherosclerotic renal artery stenosis--the importance of intensive follow-up.
European Journal of Vascular Surgery 1991 June
The aim of this study was to investigate the long-term results of percutaneous transluminal angioplasty of atherosclerotic renal artery stenosis (PTRA) in patients with renovascular hypertension with or without impending renal insufficiency who were followed up intensively with aggressive reintervention. Diagnostic work-up was based on angiography, pressure gradient and renal venous renin measurement. Patients were scheduled for regular follow-up after the PTRA and a deterioration in blood pressure or renal function was an indication for re-evaluation, and reintervention if necessary. Sixty-five patients had 71 renal artery stenoses where PTRA was attempted. It was technically successful in 59 stenoses and two occlusions and failed in ten (14%). At the end of follow-up (median 56 months [2-99]), the primary patency rate was 55%, 27 had restenosed and four were occluded, all but two within 12 months. Seventeen were treated by a further PTRA and eight by surgical reconstruction. At the end of follow-up the secondary patency after all interventions was 90%. One patient died 1 month after PTRA, and at the end of follow-up 21 patients (32%) had died, most of them (80%) from cardiovascular disease. Multivariate analyses showed a significantly reduced survival rate in patients with multiocular atherosclerosis, renal insufficiency, contralateral renal artery stenosis and ischaemic heart disease. At the end of follow-up 90% of the patients were cured or improved with regard to blood pressure. In patients with impending renal insufficiency renal function was improved in 50% and unchanged in 39%. With this strategy 55% of the patients needed only one treatment with PTRA, 25% needed a re-PTRA and 20% had to be operated on. PTRA can be recommended as initial treatment of atherosclerotic renal artery stenosis provided intensive follow-up and aggressive reintervention are performed when indicated.
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