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MYH6变体与新生儿心房功能障碍有关,这些新生儿患有左心肺低质化综合征

Melissa Quintanilla Anfinson¹, Sara Creighton², Pippa M Simpson³

¹Department of Surgery, Medical College of Wisconsin, Milwaukee, WI 53226, USA.

|November 27, 2024

概括

MYH6基因变异是低可塑性左心综合征 (HLHS) 的危险因素,会损害右心房 (RA) 的收缩性和功能. 这种RA功能障碍可能会导致VR失败,并在MYH6变种的HLHS患者中导致更糟糕的结果.

科学领域:

心脏病学心脏病学
遗传学遗传学是一个
心声回声扫描 (Echocardiography) 是一种心声回声扫描.

背景情况:

MYH6变种是低可塑性左心综合征 (HLHS) 的重要遗传风险因素,影响无心脏移植生存率.
MYH6编码了α-myosin重链 (α-MHC),这是新生儿心房中的关键收缩蛋白.

研究的目的:

在携带MYH6变异的HLHS患者中评估心房功能.
调查MYH6变异对HLHS心脏表现的功能影响.

主要方法:

使用二维斑点跟踪心声学 (2D-STE) 对I期前心房功能的回顾性,盲目分析.
测量右心房 (RA) 和右心室 (RV) 应变和应变率 (SR).
基于AV门解剖学,性别和出生年份的变异载体的对照匹配.

主要成果:

与对照组相比,患有MYH6变异的HLHS患者显示RA活性菌株 (ASct) 显著减少.
在MYH6变种携带者和对照者之间没有观察到RV菌株的显著差异.
在变异携带者中,RA储 (ASr) 和导管应变 (AScd) 与心率 (HR) 相相关,而在对照者中,RV功能与HR相相关.

结论:

在HLHS患者中,MYH6变异与RA收缩性,储和导管功能受损有关.
尽管保留了RV功能,但RA功能障碍和心房""减少可能会导致这些患者的RV衰竭和不良结果.

关键词:

在MYH6中,MYH6是MYH6.心房应变是心房应变.遗传性心脏病是一种先天性心脏病.低可塑性左心综合征是什么斑点跟踪回声心脏图谱 (speckle-tracking echocardiography) 是一种跟踪斑点的回声心脏图谱.

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