Earlier studies have shown that the aortic root, in analogy with the mitral annulus, moves towards the left ventricular apex during systole. However, there are no earlier studies comparing the amplitude of the aortic annulus motion (AAM) with that of the mitral annulus (MAM), which was the main aim of the study. Another aim was to study the intra- and interobserver reproducibility (IIOR) of measuring AAM with M-mode and 2-D echocardiography as it is not obvious which of the methods that should be used. Twenty-one healthy subjects were examined by echocardiography. AAM and MAM were measured at different sites. IIOR was measured in 10 of the subjects. There was no significant difference between average AAM (15.3 +/- 1.5 mm) and average MAM (15.6 +/- 1.5 mm) and there was a rather good agreement between the variables. There was also no significant difference between AAM at the septal site (16.3 +/- 2 mm) and average MAM, but a significant difference between AAM at the lateral site (14.2 +/- 1.6 mm) and average MAM (P<0.001) and between the both sites of measuring AAM (P<0.001). The significant difference between the two sites of measuring AAM may have anatomical reasons but may also depend on difficulties in measuring AAM at the septal site where it has lower reproducibility than at the lateral site. IIOR of measuring AAM was good when using M-mode but poor when using 2-D echocardiography and AAM should preferably be measured using M-mode and not using 2-D echocardiography.

译文

:较早的研究表明,与二尖瓣环类似,主动脉根在收缩期向左心尖移动。但是,尚无较早的研究比较主动脉瓣环运动幅度(AAM)和二尖瓣环运动(MAM)幅度,这是本研究的主要目的。另一个目的是研究使用M型和二维超声心动图测量AAM的观察者之间和观察者之间的可重复性(IIOR),因为不明确应该使用哪种方法。通过超声心动图检查二十一名健康受试者。 AAM和MAM在不同的位置进行了测量。在10位受试者中测量了IIOR。平均AAM(15.3 /-1.5 mm)和平均MAM(15.6 /-1.5 mm)之间没有显着差异,并且变量之间有相当好的一致性。间隔部位的AAM(16.3 /-2 mm)和平均MAM之间也没有显着差异,但是外侧部位的AAM(14.2 /-1.6 mm)和平均MAM(P <0.001)之间以及两者之间没有显着差异。测量AAM的两个位置(P <0.001)。测量AAM的两个部位之间的显着差异可能有解剖学原因,但也可能取决于在间隔部位测量AAM的难度,该部位的可再现性低于侧面部位。使用M模式时,测量AAM的IIOR较好,而使用2-D超声心动图时,IIOR较差,最好使用M模式而不使用2-D超声心动图测量AAM。

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