心肌张力对初级心肌吐的影响 - 一项心血管磁共振研究
Simone Romano1, Danai Kitkungvan2,3, Duc T Nguyen4
1Department of Medicine, Section of Internal Medicine C, University of Verona, Verona, Italy.
European heart journal. Cardiovascular Imaging
|September 19, 2024
概括
通过心血管磁共振 (CMR) 特征追踪测量全球纵向应变 (GLS) 预测了患有初级心肌吐 (MR) 和保存射出小部分的患者的不良结果. 这一指标有助于识别患有脱补偿风险的患者.
科学领域:
- 心脏病学 心脏病学
- 医疗成像医学成像
- 心脏机械学 心脏机械学
背景情况:
- 慢性原发性额外外 (MR) 导致左心室 (LV) 逐渐重塑.
- 异常的心肌变形 (应变) 即使有保存的喷射分数 (EF),也可能发生.
- 心血管磁共振 (CMR) 功能跟踪可以从电影图像中评估全球纵向应变 (GLS).
研究的目的:
- 评估CMR特征追踪衍生GLS的预后价值,用于初级MR患者.
- 为了确定GLS是否可以预测该患者群体的不良心血管事件.
- 为了确定患有原发性MR和保存缩功能的患者,他们可能面临更高的脱补偿风险.
主要方法:
- 一组422名慢性MR和LVEF≥50%的患者接受了CMR.
- 对患者进行了综合初级结局 (MR相关失补偿) 和全因死亡的跟踪.
- 使用多变量分析来评估GLS与结果之间的关联.
主要成果:
- GLS≥-16.6%与初级复合结局相关 (HR1.90,P=0.01).
- 在中度MR队列中,GLS≥-16.6%与较差的无事件生存率相关.
- 在对共变量进行调整后,GLS≥-16.0%与全因死亡有关 (HR2.24,P=0.02).
结论:
- 在初级MR患者中,GLS是不良结果和全因死亡的重要预测因子.
- 来自CMR特征跟踪的GLS可能成为心脏功能障碍的有价值生物标志物.
- 在观察期间,GLS可以帮助识别可能出现脱补偿的患者.
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