左束枝阻断对无症状,没有结构性心脏病的无症状个体最大功能能力的影响
Patricia Palau1, Eloy Domínguez2, Silvia Mínguez1
1Servicio de Cardiología, Hospital Clínico Universitario, Fundación para la Investigación del Hospital Clínico de la Comunidad Valenciana (INCLIVA), Universidad de Valencia, Valencia, Spain.
Revista espanola de cardiologia (English ed.)
|March 23, 2025
概括
与健康个体相比,无症状的成年人与孤立的左捆分支块 (LBBB) 具有较低的最大功能能力和有氧运动能力. 这一发现突出了即使没有结构性心脏病的潜在心血管影响.
科学领域:
- 心脏病学 心脏病学
- 运动生理学 运动生理学
- 临床研究 临床研究
背景情况:
- 在无症状个体中,左捆支部阻塞 (LBBB) 与心血管事件风险增加有关.
- LBBB对最大功能能力 (VO2峰值) 的影响尚未得到充分证实.
- 这项研究调查了与孤立的LBBB.B.B.无症状成年人的VO2峰值.
研究的目的:
- 评估和比较绝症成年人的最大有氧容量 (VO2峰值) 与隔离的LBBB与匹配的对照组.
- 评估两组之间的左心室体积和射出分数的差异.
主要方法:
- 一项前性病例控制研究,涉及81名无症状的LBBB成年人和81名匹配的对照.
- 对所有参与者进行了最大的心肺运动测试和心声回声学.
- 多变量线性混合模型分析了峰值VO2,百分比预测的峰值VO2 (pp-峰值VO2),左心室索引终端透析体积 (iLVEDV) 和左心室喷射率 (LVEF).
主要成果:
- 与对照组相比,LBBB患者的峰值VO2 (-3.3mL/kg/min) 和pp-峰值VO2 (-17.2%) 显著降低.
- 患有LBBB的个体表现出较高的iLVEDV (+4.4mL/m2) 和较低的LVEF (-2.8%).
- 在基线心血管风险因素,NT-proBNP或血红蛋白水平上没有发现显著差异.
结论:
- 孤立LBBB的无症状成年人表现出最大功能能力降低.
- LBBB与有氧能力受损和微妙的左心室功能障碍有关.
- 进一步的研究可能会探索LBBB的长期预后和管理策略.
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