应用多普勒获取Q－VPeak间期评价左室收缩功能

本研究目的评价多普勒获到Ｑ－Ｖｐｅａｋ间期评价左室收缩功能可靠性。结果表明：多普勒获取校正Ｑ－Ｖｐｅａｋ间期同超声心动图双平面面积－长度Ｓｉｍｐｓｏｎ法估测左室射血分数（ＬＶＥＦ）存在良好负相关（ｒ＝－０．７９；ＳＥＥ１３％；Ｐ＜０．００１），且此方法判断左室收缩功能异常，有较高的敏感性（８０％）、特异性（８８．９％）及准确性（８５．１％）。因此用多普勒获取Ｑ－Ｖｐｅａｋ间期可用于评价左室收缩功能。

Use Doppler-derived Q-V Peak for Assessment of Left Ventricular Systolic Function

The aim of this study was to assess the left ventricular systolic function in 47 subjects with evaluation corrected Q-V peak by Doppler. The results showed that the Doppler-derived corrected Q-V peak has a linear correlation with left ventricular ejection fraction by echocardiography ( two and four chamber view biplane area-length simpson method ) in the total subjects. The corrected Q-V provided break points that identified sys tolic dysfunction (LVEF<55%) with a high degree of accuracy (85. 1%) sensitivity (80%) and specificcity (88. 9%) in subjects, therefore, the corrected Q-V peak was useful in evaluation of left ventricular systolic func tion.