目的比较飞利浦(Philips)及通用(GE)两种型号超声仪器自动功能成像(AFI)测量左心室应变的一致性和变异性。方法采用Philips IE33(Philips组)和GE Vivid E9(GE组)超声仪分别采集56例健康志愿者的心尖二维图像,AFI得出整体、二腔、三腔及四腔应变值,比较两组所测值的一致性和变异性。结果 Philips组的整体、三腔和四腔应变值较GE组高(P<0.05)。两组所测同一受检者的数据一致性良好;同一测量者前后及不同测量者之间所测结果一致性良好,变异性小。结论应用Philips IE33和GE Vivid E9两种型号仪器测量的心肌应变值有一定差异;但所测结果一致性好,变异性小。 Objective To compare the consistency and variability of left ventricular strain measured by automatic functional imaging (AFI) between two Philips and GE models. Methods The apex images of 56 healthy volunteers were collected by using Philips IE33 (Philips group) and GE Vivid E9 (GE group) ultrasound system respectively. The AFI values ​​of whole body, two chambers, three chambers and four chambers were compared. The consistency and variability of the measured values. Results The Philips group had higher total strain, triple-cavity and four-cavity strain than GE group (P <0.05). The data of the same subjects in both groups were well consistent; the results measured before and after the same person and between different persons had good agreement and little variability. Conclusion The myocardial strain values ​​measured by Philips IE33 and GE Vivid E9 have some differences. However, the measured results are consistent and the variability is small.