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首页> 外文期刊>American Journal of Obstetrics and Gynecology >Cardiac dysfunction is associated with altered sarcomere ultrastructure in intrauterine growth restriction
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Cardiac dysfunction is associated with altered sarcomere ultrastructure in intrauterine growth restriction

机译:心脏功能障碍与子宫内生长受限的肌小节超微结构改变有关

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The purpose of this study was to assess whether abnormal cardiac function in human fetuses with intrauterine growth restriction (IUGR) is associated with ultrastructural differences in the cardiomyocyte sarcomere. STUDY DESIGN: Nine severe early-onset IUGR fetuses and 9 normally grown fetuses (appropriate growth for gestational age) who died in the perinatal period were included prospectively. Cardiac function was assessed by echocardiography and levels of B-type natriuretic peptide and troponin-l. Heart sections were imaged by second harmonic generation microscopy, which allowed unstained visualization of cardiomyocyte's sarcomere length. RESULTS: Echocardiographic and biochemical markers showed signs of severe cardiac dysfunction in IUGR fetuses. Second harmonic generation microscopy demonstrated a significantly shorter sarcomere length in IUGR as compared with appropriate growth for gestational age fetuses. CONCLUSION: IUGR is associated with changes in the cardiomyocyte contractile machinery in the form of shorter sarcomere length, which could help to explain the cardiac dysfunction previously documented in IUGR.
机译:这项研究的目的是评估具有宫内生长受限(IUGR)的胎儿胎儿的心脏功能异常是否与心肌细胞肌节的超微结构差异有关。研究设计:前瞻性纳入了围产期死亡的9例重度IUGR重症早期胎儿和9例正常生长的胎儿(适合胎龄的胎儿)。通过超声心动图和B型利钠肽和肌钙蛋白-1水平评估心脏功能。通过二次谐波显微镜对心脏切片进行成像,从而可以对心肌细胞的肌节长度进行不可见的观察。结果:超声心动图和生化指标显示IUGR胎儿出现严重的心脏功能障碍。二次谐波显微镜显示,与适当增长的胎龄胎儿相比,IUGR的肌节长度明显短。结论:IUGR与心肌细胞收缩机制的改变以较短的肌节长度有关,这可能有助于解释先前在IUGR中记载的心脏功能障碍。

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