JAMA子刊:早发房颤、心肌病及心律失常的罕见基因突变的流行率

2021-09-23 MedSci原创 MedSci原创

心房颤动(AF)是最常见的心律失常疾病,影响着全球3000多万人。

心房颤动(AF)是最常见的心律失常疾病,影响着全球3000多万人。心房颤动是心力衰竭或中风的重要原因,导致心房颤动患者的死亡风险增加。由于全球老龄化趋势,预测房颤的发病率将进一步增加,相关的社会经济负担也在不断增加。

其中,早发心房颤动(AF)可能是更严重的潜在遗传性心肌病或心律失常综合征的最初表现。为了研究早发房颤的基因检测结果,来自美国范德比尔特大学医学中心血管部的专家开展了一项研究,结果发表在JAMA Cardiology杂志上。

这项前瞻性、观察性队列研究招募了来自一个学术性医疗中心的参与者,他们在66岁之前被诊断为房颤,并通过国家心肺和血液研究所的精准医疗计划的跨基因组测序。参与者从1999年11月23日到2015年6月2日入选。暴露因素为在商业性临床基因检测实验室使用的心肌病和心律失常面板上的145个基因中发现了罕见的变异。

主要结果和措施是测序数据采用自动程序进行分析,然后由独立的盲审员小组进行人工审查。主要结果是使用美国医学遗传学和基因组学学院的标准对罕见变异进行分类:良性、可能是良性、意义未定的变异、可能致病或致病。与疾病相关的变异被定义为与常染色体显性或X连锁显性疾病相关的基因中的致病/可能致病的变异。

结果在1293名参与者中(934名[72.2%]男性;入组时年龄中位数[四分位数范围]为56[48-61]岁;房颤诊断时年龄中位数[IQR]为50[41-56]岁),基因检测发现131人(10. 1%)有疾病相关的变异,812人(62.8%)有意义不明的变异,92人(7.1%)是常染色体隐性疾病的杂合子携带者,258人(20.0%)没有可疑变异。

疾病相关突变的流行以及与遗传性心肌病和心律失常综合征的遗传重叠情况

总的来说,在30岁以前诊断为房颤的参与者中,出现疾病相关变异的可能性最高(16.8%;95%CI,10.0%-23.6%]),60岁以后最低(7.1%;95%CI,2.4%-11.9%])。与遗传性心肌病综合征相比,与房颤相关的变异与遗传性心律失常的关系更高。最常见的基因是TTN(n = 38),MYH7(n = 18),MYH6(n = 10),LMNA(n = 9),和KCNQ1(n = 8)。

综上,在这项队列研究中,基因检测在10%的早发房颤患者中发现了与疾病相关的变异。如果在30岁以前诊断,该比例更高,如果在60岁以后诊断,该比例更低。大多数致病/可能致病的变异都在与心肌病有关的基因中。这些结果支持在早发的房颤中使用基因检测。

 

参考文献:

Early-Onset Atrial Fibrillation and the Prevalence of Rare Variants in Cardiomyopathy and Arrhythmia Genes. JAMA Cardiol. Published online September 08, 2021. doi:10.1001/jamacardio.2021.3370

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    2022-01-29 lixiaol
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    2021-09-25 syscxl
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本研究对心房颤动相关心源性脑梗死再灌注治疗(包括静脉溶栓、机械取栓及桥接治疗)患者的临床资料进行回顾性研究,探讨心房颤动相关心源性脑梗死再灌注治疗临床结局的影响因素。

心房颤动分为哪四类?指南推荐:超过这个年龄,要注意筛查!

房颤最常见的症状为心悸、活动耐力下降和胸部不适,部分患者也可有头晕、焦虑及尿量增加(心房利钠肽分泌增多所致)等症状。

JCN:心房颤动患者生活方式改变的促成因素和障碍

影响房颤患者健康行为的因素是复杂的,医疗保健提供者应强化这些患者健康行为的促进因素,并为他们提供针对性的干预措施,以对抗阻碍因素。