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脉冲多普勒检测左室舒张期二尖瓣最大血流速度(E峰)与心房收缩时二尖瓣流速(A峰)之比值(E/A),是评定左室舒张期充盈功能的一项指标。在实践中,由于脉冲多普勒取样容积(SV)位置不同,明显影响E/A比值的准确性,我们进行了变换SV位置并分析其测量结果。50名健康男性,年龄18～20岁。采用Aloka SSD-870型彩色多普勒超声诊断仪,换能器为3.0MHz,取样容积为1.5mm,多普勒血流频谱记录速度100mm/(?),超声束与血流方向夹角≤15°,同步心电图记录并做时
The ratio of peak to peak mitral flow velocity (E-peak) and mitral valve velocity (A-peak) in left ventricular diastolic phase (E / A) Item indicator. In practice, due to the different locations of the pulsed Doppler sampling volume (SV), which significantly affect the accuracy of the E / A ratio, we converted the SV position and analyzed its measurements. 50 healthy men, aged 18 to 20 years old. Aloka SSD-870 color Doppler ultrasound diagnostic apparatus, the transducer is 3.0MHz, sampling volume of 1.5mm, Doppler flow spectrum recording speed of 100mm / (?), Ultrasound beam and blood flow direction angle ≤ 15 °, simultaneous ECG recording and doing time