间歇性纤维化和心律不整的米特拉脱落:揭开基于性别的差异
Lionel Tastet1, Shalini Dixit1, Rohit Jhawar1
1Department of Medicine (Cardiovascular Division), University of California, San Francisco, California, USA.
概括
额头门脱落 (MVP) 中的间歇性纤维化与心律失常有关,特别是在女性中. 心血管磁共振 (CMR) 显示了这种纤维化,这表明主要是心肌问题.
科学领域:
- 心脏病学 心脏病学
- 心脏成像 - - 心脏成像
- 电子生理学 电子生理学
背景情况:
- 无节律的 mitra 预落 (AMVP) 具有女性占主导地位,并与间歇性纤维化有关.
- 之前对AMVP纤维化的研究排除了显著的额头肌吐或额头肌环状断裂 (MAD) 的病例.
- 这项研究研究了AMVP中的纤维化,没有严重的额头肌吐 (MR) 或MAD,探索基于性别的差异.
研究的目的:
- 评估间歇性纤维化和AMVP之间的关联,不论是MAD和严重的MR.
- 调查性别在间歇性纤维化和AMVP之间的关系中的作用.
- 为了了解额头膜脱落 (MVP) 中的替代性心律失常机制.
主要方法:
- 对比心血管磁共振 (CMR) 在65名MVP患者 (2019-2022) 中使用.
- 细胞外体积分数 (ECV%),是间歇性纤维化标志物,使用T1映射量化.
- 节律失常的米特拉脱落 (AMVP) 由心室节律失常定义;晚期加多增强 (LGE) 评估了替代性纤维化.
主要成果:
- 38%的MVP病例被归类为AMVP,AMVP患者的全球ECV%更高 (31%对27%,p=0.002).
- 在AMVP中增加的ECV%是扩散的,涉及非典型的部分,并且与女性性别有显著的关联.
- 较高的ECV%独立预测的失律事件 (VT/VF) 即使在对MAD和LGE进行调整后 (p<0.01).
结论:
- 通过CMR检测到的间歇性纤维化与MVP患者没有显著的MR中的心律失常事件有关,这表明初级肌肉病过程.
- 纤维化和女性AMVP之间的更强的关联可能解释了女性严重心律失常的更高患病率.
- 这些发现强调纤维化是MVP相关心律失常的关键因素,特别是在女性中.
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