Non-invasive diagnosis and assessment of aortic valve disease and evaluation of aortic prosthesis function using echo pulsed Doppler velocimetry.
Non-invasive diagnosis and assessment of aortic valve disease and evaluation of aortic prosthesis function using echo pulsed Doppler velocimetry.
复制标题
使用回波脉冲多普勒测速仪对主动脉瓣疾病进行无创诊断和评估，并评估主动脉假体功能。
作者：
C. Veyrat;N. Cholot;G. Abitbol;D. Kalmanson
对12例正常人、38例确诊的主动脉瓣疾病患者和13例使用脉冲回波多普勒速度记录的主动脉瓣假体患者进行了升主动脉和主动脉弓中主动脉血流速度模式的无创记录。在正常受试者中，速度记录与其他作者使用侵入性程序获得的速度记录相关性良好。在主动脉瓣疾病患者中，发现速度曲线的特定异常与病变类型（狭窄或返流）及其三分量表严重程度相关。敏感性和特异性范围为80%至94%.A不太准确的严重程度分级，从主动脉瓣返流患者的左心室流出道湍流的检测比从主动脉瓣速度曲线的外观。在主动脉假体患者的研究中，53%的患者的升主动脉的速度模式异常，但没有发现时间异常，尽管存在一些技术限制，脉冲回波多普勒速度记录提供了一种新的非侵入性的，可靠的，可重复的方法，在评估主动脉病变的存在和严重程度，并显示流量异常所产生的假体。
Non-invasive recording of aortic blood flow velocity patterns in the ascending aorta and in the arch of the aorta was performed in 12 normal subjects, 38 patients with confirmed aortic valve disease, and 13 patients with aortic prostheses using pulse echo Doppler velocity recordings. In normal subjects, the velocity recordings correlated well with those obtained by other authors using invasive procedures. In patients with aortic valve disease, specific abnormalities of the velocity curves were found to correlate well both with the type of lesion (stenosis or regurgitation) and its severity on a three-point scale. Both sensitivity and specificity were found to range between 80 and 94 per cent. A less accurate grading of severity was obtained from patients with aortic regurgitation by the detection of turbulence in the left ventricular outflow tract than from the appearance of the aortic velocity curves. In the studies of patients with aortic prostheses, anomalies of the velocity pattern could be found in the ascending aorta in 53 per cent but no abnormalities of timing was found. In spite of some technical limitations, pulse echo Doppler velocity recordings provide a new non-invasive, reliable, and reproducible approach in assessing the presence and severity of aortic lesions and demonstrating flow abnormalities produced by prostheses.