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Layer‐specific strain echocardiography may reflect regional myocardial impairment in patients with hypertrophic cardiomyopathy
Cardiovascular Ultrasound ( IF 1.9 ) Pub Date : 2021-03-03 , DOI: 10.1186/s12947-021-00244-3
Zhongxiu Chen 1 , Chunmei Li 1 , Yajiao Li 1 , Li Rao 1 , Xiaoling Zhang 1 , Dan Long 2 , Chen Li 1
Affiliation  

Our study aimed to determine whether layer-specific strain (LSS) could reflect regional myocardial impairment in patients with hypertrophic cardiomyopathy (HCM). The study enrolled 50 patients with HCM and 30 age-matched healthy controls. Transmural gradient of longitudinal strain (TGLS), defined as the difference between the longitudinal strain of the endocardium and epicardium in a left ventricular segment, was used to reflect layer-specific myocardial impairment. Negative TGLS was consistently observed in healthy controls. The TGLS was relatively consistent within the basal, middle, and apical levels in healthy controls,but showed a significant gradient from the base towards the apex. In patients with HCM, the hypertrophic segments had significantly higher TGLS than the relatively normal segments or healthy controls at all 3 levels (0.14 % ± 3.48 % vs. −2.65 % ± 4.44 % vs. −2.17 % ± 1.66 % for basal, − 0.72 % ± 3.71 % vs. −4.02 % ± 4.00 % vs. −3.58 % ± 2.29 % for middle, and − 8.69 % ± 7.96 % vs. −11.44 % ± 6.65 % vs. −10.04 % ± 3.20 % for apex). Abnormal TGLS, defined as positive TGLS, in patients with HCM was associated with chest pain. In receiver operating characteristic curve analysis, a large area of abnormal TGLS (> 4 segments) had moderate accuracy for predicting chest pain (sensitivity, 73.3 %; specificity, 70.0 %). TGLS, a novel LSS derived parameter, may reflect regional myocardial impairment in patients with HCM.

中文翻译:

层特异性应变超声心动图可能反映肥厚型心肌病患者的局部心肌损伤

我们的研究旨在确定层特异性应变 (LSS) 是否可以反映肥厚型心肌病 (HCM) 患者的局部心肌损伤。该研究招募了 50 名 HCM 患者和 30 名年龄匹配的健康对照。纵向应变的透壁梯度 (TGLS),定义为左心室段中心内膜和心外膜的纵向应变之间的差异,用于反映层特异性心肌损伤。在健康对照中始终观察到阴性 TGLS。TGLS在健康对照组的基底、中间和顶端水平内相对一致,但从基底到顶端呈现出显着的梯度。在 HCM 患者中,肥大节段的 TGLS 显着高于所有 3 个水平的相对正常节段或健康对照(0.14 % ± 3. 48 % 对比 -2.65 % ± 4.44 % 对比 -2.17 % ± 1.66 % 基础,- 0.72 % ± 3.71 % 对比 -4.02 % ± 4.00 % 对比 -3.58 % ± 2.29 % 和 - 8.6 % 中间± 7.96 % 对比 -11.44 % ± 6.65 % 对比 -10.04 % ± 3.20 %(顶点)。HCM 患者的异常 TGLS,定义为阳性 TGLS,与胸痛有关。在受试者工作特征曲线分析中,大面积异常 TGLS(> 4 个节段)对预测胸痛具有中等准确度(敏感性,73.3%;特异性,70.0%)。TGLS 是一种新的 LSS 衍生参数,可能反映 HCM 患者的局部心肌损伤。HCM 患者与胸痛有关。在受试者工作特征曲线分析中,大面积异常 TGLS(> 4 个节段)对预测胸痛具有中等准确度(敏感性,73.3%;特异性,70.0%)。TGLS 是一种新的 LSS 衍生参数,可能反映 HCM 患者的局部心肌损伤。HCM 患者与胸痛有关。在受试者工作特征曲线分析中,大面积异常 TGLS(> 4 个节段)对预测胸痛具有中等准确度(敏感性,73.3%;特异性,70.0%)。TGLS 是一种新的 LSS 衍生参数,可能反映 HCM 患者的局部心肌损伤。
更新日期:2021-03-03
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