P-167: Doppler resistivity index: a predictive tool for clinical outcome after revascularization of renal artery stenosis?

In this study we evaluated the role of resistivity index (RI) in predicting the outcome (6–12-month follow up) of blood pressure (BP) and renal function (RF) in 104 hypertensive patients(HP)(50 females) with renovascular disease (78 atherosclerotic and 41 fibrodysplasic) submitted to successful percutaneous renal artery stenosis revascularization. HP underwent trans-lumbar duplex Ultrasound. RI was derived from the interlobular arteries and a referral cut-off value of 0.65 was determined by ROC curves. After revascularization, HP were considered not improved, if BP was unchanged cured if BP decreased 10% with drug treatment or any decrement with reduced drug treatment as compared to baseline. Pre-procedure RI values were different (p=0.001) for atherosclerotic (0.64 ± 0.12) and fibrodysplasic (0.54 ± 0.11) stenoses. In atherosclerotic HP, despite no difference in drug treatment, baseline RI resulted significantly (p