个性化QT间隔 (QTi) 是长QT综合征的强大诊断工具:来自大型验证研究的结果
Tomas Robyns1,2, Dieter Nuyens3, Bert Vandenberk1,2
1Department of Cardiovascular Diseases, University Hospitals Leuven, Leuven, Belgium.
Frontiers in cardiovascular medicine
|May 30, 2023
概括
个性化QT间隔 (QTi) 有效诊断长QT综合征 (LQTS),表现优于纠正的QT间隔 (QTc). 性别特定的QTi切线在LQTS诊断中实现了高灵敏度和特异性.
科学领域:
- 心脏病学 心脏病学
- 遗传学 遗传学 是一个
- 医学诊断 医学诊断 医学诊断
背景情况:
- 长QT综合征 (LQTS) 诊断依赖于心电图和基因定型,但高达25%的基因型阳性患者具有正常的QT (QTc) 间隔.
- 来自霍尔特数据的个性化QT间隔 (QTi) 在预测LQTS家族的突变状态方面表现有前途.
研究的目的:
- 为了确认 QTi 在长 QT 综合征 (LQTS) 患者的诊断价值.
- 为了提高诊断准确度,改进QTi截止值.
- 评估LQTS患者QTi的个体内变异性.
主要方法:
- 对254名LQTS患者和201名对照患者的24小时霍尔特记录的分析.
- 使用接收器运行特征 (ROC) 曲线确定QTi截止值.
- 验证QTi截止值与独立队列的验证.
主要成果:
- 在对照组和LQTS患者之间,QTi表现出了很好的区别 (女性AUC为0.96,男性为0.97).
- 性别特定的切断值 (女性为445毫秒,男性为430毫秒) 达到88%的灵敏度和96%的特异性.
- 在重复的霍尔特记录中,没有观察到QTi的显著个体内变异.
结论:
- QTi是长QT综合征 (LQTS) 的一个有价值的诊断工具,补充了传统方法.
- 新的取决于性别的QTi截止值提高了LQTS的诊断准确性.
- QTi为LQTS评估提供了可靠和稳定的指标.
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