Regional myocardial long-axis strain and strain rate measured by different tissue Doppler and speckle tracking echocardiography methods: a comparison with tagged magnetic resonance imaging
Regional myocardial long-axis strain and strain rate measured by different tissue Doppler and speckle tracking echocardiography methods: a comparison with tagged magnetic resonance imaging
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DOI：
10.1093/ejechocard/jen201
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发表时间：
2009-03-01
影响因子：
--
通讯作者：
Stoylen, Asbjorn
中科院分区：
文献类型：
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作者：
Amundsen, Brage H.;Crosby, Jonas;Stoylen, Asbjorn
比较四种不同的超声心动图方法，分别或组合基于组织多普勒成像 (TDI) 和散斑跟踪 (ST)，进行长轴应变和应变率 (SR) 测量，并使用磁共振成像 (MRI) 标记作为参考。 在 21 名受试者（10 名患有心肌梗塞）中，通过四种不同的回波方法测量收缩期峰值应变以及收缩期和舒张早期 SR：（i）二维（2D）应变（B 模式）； (ii) 段终点的 ST（定制软件）（B 模式）； (iii) 与 (ii) 类似，但将 ST 与组织多普勒跟踪相结合； (iv) 来自组织多普勒速度梯度 (VG) 的应变。应变与 MRI 标记的一致性比 SR 更好。 TDI-VG 方法的 95% 的一致性限制更宽，并且与 MRI 标记和其他回波方法相比，2D 应变显示出负偏差。 2D 应变的重现性比 MRI 标记和其他回波方法更好。单独 ST 或与 TDI 组合似乎适合自动测量局部心肌变形。该研究提供了有关不同方法的优缺点的重要信息，这对于进一步开发以提高准确性和适用性非常重要。
Compare four different echocardiographic methods, based on tissue Doppler imaging (TDI) and speckle tracking (ST) separately or combined, for long-axis strain and strain rate (SR) measurements, using magnetic resonance imaging (MRI) tagging as a reference.In 21 subjects (10 with myocardial infarction) peak systolic strain and systolic and early diastolic SR were measured by four different echo methods: (i) two-dimensional (2D) strain (B-mode); (ii) ST (custom software) of segment end-points (B-mode); (iii) similar to (ii), but combining ST with tissue Doppler tracking; (iv) strain from tissue Doppler velocity gradients (VG). Agreement with MRI tagging was better for strain than for SR. Ninety-five per cent limits of agreement were wider for the TDI-VG method, and 2D strain showed negative bias compared with MRI tagging and the other echo methods. Reproducibility was better for 2D strain than for MRI tagging and the other echo methods.ST alone or combined with TDI seems to be suitable for automated measurements of regional myocardial deformation. The study gives important information on the strengths and weaknesses of the different methods, which is important for further development to increase accuracy and applicability.