The left arteriorenal(LRA) hemodynamics changes were measured by two-dimensional color Doppler imaging(2D-CDI) before and after cardiac valve replacements(CVR).

• 用二维彩色多普勒超声图（2D－CDI）探测心瓣膜置换术（CVR）前后左肾动脉（LRA）血流动力学变化。