Reply: To PMID 24814570.
Reply: To PMID 24814570.
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回复：PMID 24814570。
DOI：
10.1111/echo.13029
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Kagami S
中科院分区：
文献类型：
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作者：
Hayabuchi Y;Sakata M;Kagami S
背景本研究的目的是评估使用标准超声心动图图像评估螺旋心室心肌带形态和功能的可行性。方法获得132名正常儿童的超声心动图数据。我们试图在 Torrent-Guasp 提出的螺旋心肌带模型中识别回声亮线，该亮线充当室间隔升段和降段之间的边界，以及左心室下壁左段和升段之间的边界。使用斑点追踪超声心动图比较亮线两侧的心肌变形。结果在所有受试者的四腔视图中，在心室中隔中都可以看到分隔升段和降段的亮线。在 116 名受试者 (87.9%) 的胸骨旁短轴切面上倾斜地观察到这种回声边界。上升段和下降段之间的峰值纵向或周向应变没有显着差异。然而，下降段从 QRS 出现到周向应变峰值的时间显着低于上升段（394.5 ± 37.0 vs. 432.7 ± 33.1 ms，P < 0.0001），而达到峰值纵向应变的时间没有显着差异（394.4 ± 26.4 vs. 393.2 ± 24.1 ms）。 86 名受试者 (65.2%) 在肋下区域的短轴视图中检测到左段和升段之间的亮线。左侧周向应变达到峰值的时间明显低于升段（380.1±32.0 vs. 435.7±37.9ms，P<0.0001）。结论在标准超声心动图图像中可以观察到螺旋形心室心肌带。
BackgroundThe purpose of this study was to assess the feasibility of morphological and functional evaluation of the helical ventricular myocardial band using standard echocardiographic images.MethodsEchocardiographic data were obtained from 132 normal children. We attempted to identify the echogenic bright line serving as the boundary between the ascending and descending segments in the ventricular septum, and between the left and ascending segments in the left ventricular inferior wall in the helical myocardial band model proposed by Torrent‐Guasp. Myocardial deformations on both sides of the bright line were compared using speckle tracking echocardiography.ResultsThe bright line separating the ascending from descending segment was visible in the mid‐ventricular septum in the four‐chamber view in all subjects. This echogenic boundary was observed obliquely in the parasternal short‐axis view in 116 subjects (87.9%). There was no significant difference in peak longitudinal or circumferential strain between the ascending and descending segments. However, the time from the QRS onset to peak circumferential strain was significantly lower in the descending than ascending segment (394.5 ± 37.0 vs. 432.7 ± 33.1 ms, P < 0.0001), whereas there was no significant difference in the time to peak longitudinal strain (394.4 ± 26.4 vs. 393.2 ± 24.1 ms). The bright line between the left and ascending segment was detected in the short‐axis view from the subcostal region in 86 subjects (65.2%). The time to peak circumferential strain was significantly lower in the left than ascending segment (380.1 ± 32.0 vs. 435.7 ± 37.9 ms, P < 0.0001).ConclusionThere is a helical ventricular myocardial band that can be observed in standard echocardiographic images.