Yoshito Yamaguchi1, Fuyuko Akagaki2, Aya Nakamori2, Toshihiro Sugiura2. 1. Division of Nephrology, Department of Internal Medicine, Otemae Hospital, 5-34 Otemae 1-chome, Chuo-ku, Osaka, 540-0008, Japan. yyamaguchi@otemae.gr.jp. 2. Division of Nephrology, Department of Internal Medicine, Otemae Hospital, 5-34 Otemae 1-chome, Chuo-ku, Osaka, 540-0008, Japan.
Abstract
BACKGROUND: Renal resistive index (RI) calculated using renal Doppler ultrasonography (RDU) has recently been considered a clinically important indicator of renal outcome, survival, and systemic arteriosclerotic disorders. However, the cause of RI elevation remains unclear. The present study was an effort to first, identify the factors related to RI elevation, and second, understand the effect of renin-angiotensin system inhibitors (RAS-Is) on renal RI elevation. METHODS: We carried out this single-center case-control study among 100 CKD patients, recruited from outpatients who underwent RDU more than twice, at least a year apart. The rate of renal RI change per year (dRIpy) was chosen as the dependent variable: [(last examined renal RI-initial examined renal RI)/(initial examined renal RI × period of observation) × 100 (%/year)]. We examined the association between dRIpy and other clinical and biological data. RESULTS: Among 100 CKD patients, the average serum creatinine and eGFR were 1.76 ± 0.84 mg/dL and 37.0 ± 18.2 ml/min/1.73 m2, respectively. The average dRIpy in all patients was 1.8 ± 1.4%/year. The linear multiple regression demonstrated that dRIpy was positively associated with the presence of diabetes mellitus (DM) and high low-density lipoprotein cholesterol (LDL) levels, and negatively with eGFR and RAS-I use. CONCLUSIONS: This study demonstrated that the elevation of RI was related to DM, eGFR, high LDL, and the use of RAS-Is. In particular, RAS-Is could contribute towards suppressing the elevation of RI in CKD patients and towards preventing the development of renal failure in CKD patients.
BACKGROUND: Renal resistive index (RI) calculated using renal Doppler ultrasonography (RDU) has recently been considered a clinically important indicator of renal outcome, survival, and systemic arteriosclerotic disorders. However, the cause of RI elevation remains unclear. The present study was an effort to first, identify the factors related to RI elevation, and second, understand the effect of renin-angiotensin system inhibitors (RAS-Is) on renal RI elevation. METHODS: We carried out this single-center case-control study among 100 CKDpatients, recruited from outpatients who underwent RDU more than twice, at least a year apart. The rate of renal RI change per year (dRIpy) was chosen as the dependent variable: [(last examined renal RI-initial examined renal RI)/(initial examined renal RI × period of observation) × 100 (%/year)]. We examined the association between dRIpy and other clinical and biological data. RESULTS: Among 100 CKDpatients, the average serum creatinine and eGFR were 1.76 ± 0.84 mg/dL and 37.0 ± 18.2 ml/min/1.73 m2, respectively. The average dRIpy in all patients was 1.8 ± 1.4%/year. The linear multiple regression demonstrated that dRIpy was positively associated with the presence of diabetes mellitus (DM) and high low-density lipoprotein cholesterol (LDL) levels, and negatively with eGFR and RAS-I use. CONCLUSIONS: This study demonstrated that the elevation of RI was related to DM, eGFR, high LDL, and the use of RAS-Is. In particular, RAS-Is could contribute towards suppressing the elevation of RI in CKDpatients and towards preventing the development of renal failure in CKDpatients.
Authors: D Caruso; M D'Avino; C Acampora; L Romano; N Bevilacqua; G Caruso; D Degli Esposti; C Borghi Journal: J Cardiovasc Pharmacol Date: 2004-11 Impact factor: 3.105
Authors: Lesley A Inker; Brad C Astor; Chester H Fox; Tamara Isakova; James P Lash; Carmen A Peralta; Manjula Kurella Tamura; Harold I Feldman Journal: Am J Kidney Dis Date: 2014-03-16 Impact factor: 8.860