Isovolume 基本例句 同容量¹⁰⁰ Study of Left VentricularIsovolumeRelaxation Time and Doppler Spectrum of Pulmonary Vein in Coronary Heart Disease with Left Ventricular Systolic Dysfunction冠心病左室收缩功能不全患者等容舒张时间及肺静脉血流频谱变化的研究 Isovolumepressure-flow curve同容量压力-流量曲线