RECOMMENDATIONS REGARDING QUANTITATION IN M-MODE ECHOCARDIOGRAPHY - RESULTS OF A SURVEY OF ECHOCARDIOGRAPHIC MEASUREMENTS
RECOMMENDATIONS REGARDING QUANTITATION IN M-MODE ECHOCARDIOGRAPHY - RESULTS OF A SURVEY OF ECHOCARDIOGRAPHIC MEASUREMENTS
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DOI：
10.1161/01.cir.58.6.1072
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发表时间：
1978-01-01
期刊：
影响因子：
37.8
通讯作者：
WEYMAN, A
中科院分区：
文献类型：
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作者：
SAHN, DJ;DEMARIA, A;WEYMAN, A
分布了400个M型超声心动图调查，以确定M型超声心动图测量中的观察者间变异性。这样做的目的是为了检查测量标准化的必要性和确定标准。每个调查包括5个带有校准标记的M型超声心动图，由调查参与者匿名测量。回声被判断为适合结构测量的质量。在400人中，有76人(19%)被退回，以便比较观察员之间的可变性并检查所使用的测量标准。对于每种测量标准，计算了每种结构的平均测量值和不确定度百分比。对于主动脉，33%的检查者将其测量为外/内或前缘尺寸，20%的人将其测量为外/外尺寸。测量的百分比不确定度(1.97SD除以平均值)显示，使用前一种标准测量的25包5个回波的平均值为13.8%，使用后一种标准测量的平均不确定度为24.2%。对于室腔和腔内测量，几乎1/2的检查者使用QRS的峰值，1/2的检查者使用QRS的起始点来确定舒张末。在这项研究中，间隔、后壁和左心室腔大小的测量不确定度百分比估计为10-25%。右室腔和右室前壁的阳性率明显较高(40-70%)。调查显示，在检查相同的回声时，观察员之间和实验室之间在测量方面存在显著差异，并表明需要进行持续的教育、质量控制和测量标准的标准化。对M型超声心动图测量的新标准提出了建议。
Four hundred M-mode echocardiographic surveys were distributed to determine interobserver variability in M-mode echocardiographic measurements. This was done with a view toward examining the need and determining the criteria for standardization of measurement. Each survey consisted of 5 M-mode echocardiograms with a calibration marker, measured by the survey participants anonymously. The echoes were judged of adequate quality for measurement of structures. Of the 400, 76 (19%) were returned, allowing comparison of interobserver variability and examination of the measurement criteria which were used. Mean measurements and percent uncertainty were derived for each structure for each criterion of measurement. For the aorta, 33% of examiners measured the aorta as an outer/inner or leading edge dimension and 20% measured it as an outer/outer dimension. The percent uncertainty for the measurement (1.97 SD divided by the mean) showed a mean of 13.8% for the 25 packets of 5 echoes measured using the former criteria and 24.2% using the latter criteria. For ventricular chamber and cavity measurements, almost 1/2 of the examiners used the peak of the QRS and 1/2 of the examiners used the onset of the QRS for determining end-diastole. Estimates of the percent of measurement uncertainty for the septum, posterior wall and left ventricular cavity dimension in this study were 10-25%. They were much higher (40-70%) for the right ventricular cavity and right ventricular anterior wall. The survey shows significant interobserver and interlaboratory variation in measurement when examining the same echoes and indicates a need for ongoing education, quality control and standardization of measurement criteria. Recommendations for new criteria for measurement of M-mode echocardiograms are offered.