脉冲多普勒超声心动检测肺静脉血流与左室舒张压的相关性研究

The Relationship between Pulmonary Venous Flow Velocities Recorded by Pulse Doppler Echocardiograpby and Left Ventricular Diastolic Pressure

研究经胸脉冲式多普勒超声心动图所检测的肺静脉血流与左室舒张压的相关性。对35例患者的超声心动图及左室造影进行观察，分析肺静脉血流与二尖瓣血流频谱所获指标与左室舒张庄关系。静脉血流A波间期和二尖瓣血流A波间期之差（d－dif）与左室舒张末压呈显著正相关性（r＝0．5658，P＜0．001），以d－dif判断左室舒张功能不全（LVEDP＞15mmHg）的敏感性为75．0％，特异性为86．7％。d－dif与Pre－A和LVa亦具有正相关性（P＜0．01）。d－dif是一项能够较为准确地反映左室舒张压变化的指标。

In order to investigate the relationship between the pulmonary venous flow velocities,measured by pulse. Doppler echocardiography,and the left ventricular diastolic pressure. The left ventricular di astolic pressure were measured in 35 patients undergoing the left ventricular angiography. Mitral and pulmonary venous flow velocity variables were recorded by transthoracic Doppler ultrasound. The difference between the duration of the pulmonary venous flow reversed A wave and the mitral A wave (d-dif) had the best correlation with the left ventricular end-diastolic pressure (r=0. 5658,P<0. 001 ) .and a longer duration of the pulmonary venous reversed A wave than that of the mitral A wave could predict the left end-diastolic pressure>15 mmHg.with a sensitivity of 75. 0% and a specificity of 86. 7%:the relation of the ddt f to the left ventricular pressure prior to atrial contraction (pre-A) and the increase in the left ventricular pressure due to atrial systole were statistically significant. D-dif may be a good index evaluated the change of the left ventriaular diastolic pressure.