• Osami Kawarada, Yoshiaki Yokoi, Nobuyuki Morioka, Shinji Shiotani, and Akihiro Higashimori.
• Department of Cardiology, Kishiwada Tokushukai Hospital, Osaka, Japan. kawarada@stanford.edu
• EuroIntervention. 2010 Sep 1; 6 (4): 485-91.

AimsThe aims of this study were to evaluate the effects of renal stenting on cardiac function using echocardiographic parameters, and to clarify whether changes in clinical and echocardiographic variables after renal stenting differ between atherosclerotic renal artery stenosis (ARAS) patients with and without cardiac symptoms.Methods And ResultsA total of 61 patients who underwent renal stenting and echocardiography were included in the study. Left ventricular (LV) filling pressure and LV relaxation were evaluated with tissue Doppler imaging. The ratio of the peak early diastolic mitral inflow velocity to the peak early mitral annular velocity (E/e' ratio) and the e'-velocity were measured to assess diastolic function. LV ejection fraction remained unchanged, but the E/e' ratio (P<0.001) and the e'-velocity (P=0.004) improved after renal stenting. In particular, the E/e' ratio improved from 13.7±5.6 to 11.9±4.0 (P=0.002) within 24 hours after renal stenting and remained low at 11.2±3.8 after a mean follow-up period of 7±4 months (P=0.001). Patients with cardiac symptoms showed significantly better change in E/e' ratio (P=0.002) and E-velocity (P=0.005) compared to those without cardiac symptoms. Cardiac symptoms also significantly improved after renal stenting (New York Heart Association functional class: 2.5±0.6 at baseline to 1.4±0.6 at follow-up; P<0.001).ConclusionsRenal stenting improved echocardiographic parameters that reflect LV diastolic function, and yielded a higher benefit for E/e' ratio and E-velocity in patients with cardiac symptoms than in those without cardiac symptoms.

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