概括
运动引起的R波在多个ECG导线 (epsilon R) 上的增加加上ST段变化强烈表明冠状动脉疾病. 这一发现突出了epsilon R R的发现.
科学领域:
- 心脏病学 心脏病学
- 诊断成像 诊断成像 诊断成像
- 运动生理学 运动生理学
背景情况:
- 胸痛综合征是常见的临床表现,需要准确的诊断.
- 运动心电图 (ECG) 是评估冠状动脉疾病 (CAD) 的标准工具.
- 运动期间特定心电图变化的诊断实用性,特别是QRS变化,需要进一步阐明.
研究的目的:
- 评估冠状动脉疾病的运动诱导的多导线QRS变化 (epsilon R) 的诊断准确性.
- 为了确定血液动力学意义和与左心室功能的相关性.
- 将epsilon R的诊断产量与传统的ST段变化进行比较.
主要方法:
- 对230名患有胸痛综合征的患者进行前性研究,这些患者接受了布鲁斯协议的炼测试.
- 对多个导线 (epsilon R) 和ST段偏差中R波增加的运动心电图的分析.
- 电脑心电图结果与冠状动脉血管学结果的相关性,左心室功能 (末端透气压,异能,射出分数) 和运动参数.
主要成果:
- 在99%的患者中,埃普西隆R加ST段变化>1毫米的存在确定了冠状动脉疾病,明显高于个体标志物.
- 85%的患有epsilon R和ST变化的患者患有多血管冠状动脉疾病.
- 升高的epsilon R与异常的左心室末端透缩压,静止不协同,以及减少的射出分数相关,不论ST变化.
结论:
- 运动诱导的epsilon R,特别是与ST段变化相结合时,是诊断冠状动脉疾病的高度敏感标志物.
- 运动期间epsilon R的存在与左心室功能受损和血液动力学异常有关.
- 埃普西隆R可能反映了冠状动脉疾病患者的左心室潜在功能障碍.
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