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晚近多普勒超声已能测定静息搏出量、心排血量和射血流速峰值(PEV).平均年龄27(22～39)岁的20(男18、女2)例健康者(组Ⅰ)和平均年龄52(29～65)岁的17(男15、女2)例经造影证实的冠心病患者(组Ⅱ),按症状限制性Bruce方案进行立位活动平板试验.从胸骨旁二维观测定主动脉瓣环水平或Valsalva窦以上水平的直径,计算主动脉横截面积.从胸骨上凹,以脉冲波和连续波多普勒超声记录升主动脉或降主动脉内最佳流速曲线.取连续3～5个心动周期的流速
Late ventricular Doppler ultrasound has been able to measure resting stroke volume, cardiac output and peak ejection velocity (PEV) .Average mean age 27 (22-39) of 20 (male 18, female 2) healthy Group Ⅰ) and 17 (15 male and 2 female) patients with a mean age of 52 (29-65) years old undergoing coronary angiography (group Ⅱ) undergoing stereotactic plate test according to the symptom-limited Bruce regimen. Side two-dimensional observation of the aortic annulus level or Valsalva sinus above the diameter of the diameter of the aorta to calculate the cross-sectional area from the sternum concave pulse wave and continuous wave Doppler ultrasound recording ascending aorta or descending aorta best Flow curve. Take 3 to 5 consecutive cardiac cycles