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延长QTc间隔对高增多性心肌病的死亡风险的影响
Shun Hasegawa1, Satoshi Higuchi1,2, Yuichiro Minami1
1Department of Cardiology Tokyo Women's Medical University Tokyo Japan.
在患有缩性心肌病 (HCM) 的患者中,延长校正的QT (QTc) 间隔与与HCM相关的死亡风险增加有关. 这一发现强调了QTc延长作为HCM患者心脏不良事件的显著预测因素.
科学领域:
- 心脏病学 心脏病学
- 电子生理学 电子生理学
- 遗传学 遗传学 是一个
背景情况:
- 在缩性心肌病 (HCM) 患者中,纠正的QT (QTc) 间隔和危及生命的心脏事件之间的关联尚未得到充分证实.
- 这项研究旨在澄清QTc延长与HCM相关死亡率之间的关系.
研究的目的:
- 调查延长的QTc间隔是否是HCM相关死亡的独立预测因素.
- 确定QTc延长与特定终点之间的关联,如HCM中的突然死亡或致命性心律失常.
主要方法:
- 分析了一组445名HCM患者的队列.
- 在基线测量QTc间隔;延长被定义为>450毫秒.
- 与HCM相关的死亡包括突然死亡,致命性心律失常,心力衰竭和中风.
主要成果:
- 26.4%的患者在入学时出现了QTc延长.
- 在8.1年的中位数随访期间,15.1%的人患有HCM相关的死亡.
- 延长的QTc与HCM相关的死亡 (aHR: 1.91) 和突然死亡/致命性心律失常 (aHR: 2.01) 独立相关.
结论:
- QTc延长是HCM相关死亡的重要独立风险因素.
- 这种关联延伸到突发死亡或潜在致命心律失常事件的综合终点.
- 评估QTc间隔可能有助于高性损伤性心肌病患者的风险分层.
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