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Renal artery stenting in patients with chronic ischemic heart disease.

OBJECTIVES: To investigate the role of renal stenting in selected patients with chronic ischemic heart disease and renal artery stenosis.

METHODS: Consecutive patients, with chronic ischemic heart disease and severe hypertension and/or impaired renal function undergoing renal stenting, were prospectively enrolled. Mid-term (at least 2 years) follow-up was performed to assess both changes in renal function [serum creatinine and estimated glomerular filtrate rate (eGFR)] and blood pressure (BP) control (number of required drugs) and to record the incidence of clinical major adverse events. Moreover, in the first consecutive 24 patients, out-of-range pressure values at 24-hr BP monitoring and GFR at renal scintigraphy were measured at baseline and 1 month after stenting.

RESULTS: Seventy patients treated by stenting on 86 renal arteries entered the study. Procedural success rate was 99% and no major complication occurred. At 2-year follow-up, both mean serum creatinine (-0.1 +/- 0.7 mg/dl at follow-up compared to baseline, P = 0.6) and eGFR (+3.7 +/- 23.5 ml/min/1.73m(2) at follow-up compared to baseline, P = 0.2) did not significantly change while the number of drugs required to control BP significantly decreased (2.7 +/- 0.8 to 2.2 +/- 0.7, P < 0.0001). In the subset of 24 patients evaluated at 1 month, GFR significantly increased (62 +/- 20 ml/min to 67 +/- 21 ml/min; P = 0.008) and the rate of the out-of-range systolic pressure values at 24-hr monitoring significantly decreased (51-33%, P = 0.005). Elevated baseline creatinine values and the presence of global renal ischemia were identified as predictors of poor outcome at the multivariate analysis.

CONCLUSIONS: In selected patients with chronic ischemic heart disease and hypertension and/or renal insufficiency, renal stenting may be performed with very low periprocedural complications and results in unchanged renal function and improved BP control.

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