电心电图特征与临床下左心室缩功能障碍在孤立的左束分支患者之间的关系
Guangyuan Li1,2, Yonghuai Wang1,2, Bo Pang1,2
1Department of Cardiovascular Ultrasound, First Hospital of China Medical University, Shenyang, Liaoning, China.
Cardiovascular ultrasound
|April 30, 2025
概括
电心电图 (ECG) 可以识别左心室缩功能障碍 (LVSD) 的临床下患者与左捆分支阻塞和保存的喷射分数. 关键的心电图标记,如QRS持续时间,QS模式和不协调的LBBB预测LVSD.
科学领域:
- 心脏病学 心脏病学
- 医疗成像医学成像
- 生物医学工程 生物医学工程
背景情况:
- 在患有左捆分支阻塞和保存的喷射分数 (LBBBpEF) 的患者中,亚临床左心室缩功能障碍 (LVSD) 需要早期检测.
- 电心电图 (ECG) 显示出作为LBBBpEF中亚临床LVSD的查工具的希望,但需要验证.
研究的目的:
- 研究LBBBpEF患者的特定心电图特征和亚临床LVSD之间的关系.
- 评估心电图参数在识别早期LVSD患者中的有效性.
主要方法:
- 分析了111名LBBBpEF患者使用二维斑点跟踪回声心脏学来确定LV全球纵向菌株 (LV GLS).
- 亚临床LVSD被定义为LV GLS>-20%.
- 记录和分析了包括心率,QRS持续时间,P-R持续时间,QRS形态,T波形态,QS模式和不和的LBBB在内的ECG参数.
主要成果:
- 52名患者 (46.8%) 患有亚临床LVSD.
- 与正常功能患者相比,患有亚临床LVSD的患者表现出更长的QRS持续时间,更高的QS模式频率,以及更多的不协调的LBBB实例.
- 对于检测亚临床LVSD (75.00%的灵敏度,72.88%的特异性) 发现了153毫秒的最佳QRS持续时间切断值.
- 一个结合QRS持续时间,QS模式和不协调的LBBB的模型产生了最高的AUC (0.82).
结论:
- QRS持续时间,QS模式和不一致的LBBB是LBBBpEF中亚临床LVSD的独立预测因素.
- 综合性心电图评估提供了一种简单的查方法,用于在这个患者群体中识别亚临床LVSD.
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