Enhanced Flow Velocity after Stenting of Renal Arteries Is Associated with Decreased Renal Function
| Autor: | Bernhard Kramann, Michael Uder, Carla Maute, Matthias Girndt, Harald Kaul, Hans Köhler |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Male Nephrology medicine.medical_specialty Duplex ultrasonography medicine.medical_treatment Renal Artery Obstruction Renal function Constriction Pathologic Kidney Renal Artery medicine.artery Internal medicine Angioplasty medicine Humans Renal artery Aged Aged 80 and over Ultrasonography Doppler Duplex business.industry Incidence Stent General Medicine Middle Aged medicine.disease Cardiology Female Stents Radiology business Blood Flow Velocity Follow-Up Studies Kidney disease |
| Zdroj: | Nephron Clinical Practice. 105:c84-c89 |
| ISSN: | 1660-2110 |
| Popis: | Background: Atherosclerotic renal artery stenosis (RAS) is frequently treated by angioplasty and stent placement. Duplex sonography is an established noninvasive technique for patient follow-up. There is lack of evidence that routine monitoring of asymptomatic patients with stable blood pressure is needed. Methods: Renal duplex sonography was performed in 64 patients who had received percutaneous angioplasty and stenting of an atherosclerotic RAS. Duplex sonographic diagnosis was made by a combination of direct flow measurement in the renal artery and evaluation of intrarenal resistive indices. Renal function was determined by serum creatinine and calculated glomerular filtration rate (GFR). Results: With a mean follow-up of 28 months after angioplasty, a flow velocity of >2.0 m/s was detected within the stented arteries in 11/64 patients. While the initial blood pressure and GFR as well as the influence of angioplasty on these parameters were not different, the decrease in renal function over time was significantly higher in patients with flow enhancement (annual GFR decrease, 8.0 ml/min vs. 0.8 ml/min; p < 0.05). Conclusion: Follow-up duplex sonography in patients after renal artery stenting detected an unexpectedly high rate of in-stent restenosis associated with enhanced loss of renal function. Routine duplex sonographic follow-up may detect patients at risk of more rapidly declining renal function. |
| Databáze: | OpenAIRE |
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