在患有初级心肌吐和保留左心室喷射分数的患者中,压力期间左心室体积和功能发生变化
Rūta Dirsienė1, Rugilė Martinaitytė1, Eglė Tamulėnaitė1
1Faculty of Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania.
Perfusion
|April 30, 2024
概括
在患有 mitra 吐 (MR) 和保留射出分数的患者中,左心房 (LA) 功能受损. 压力心声学可以识别这些变化,并预测运动诱导的肺高血压.
科学领域:
- 心脏病学 心脏病学
- 心声回声扫描 (Echocardiography) 是一种心声回声扫描.
- 心脏生理学 心脏生理学
背景情况:
- 由于补偿机制,原发性 mitrale 吐 (MR) 往往呈现无症状,可能延迟治疗.
- 早期发现左心房 (LA) 功能障碍对于无症状的MR患者和保存的左心室喷射分数 (LVEF) 至关重要.
- 压力心声学和斑点跟踪分析为评估亚临床LA功能障碍提供了潜力.
研究的目的:
- 研究应激心电回声学和斑点跟踪分析在评估LA功能的有用性,主要MR和保存LVEF的无症状患者.
- 为了确定LA参数,肺动脉压力和NT-proBNP水平之间的关系.
- 在这个患者队列中确定运动诱导肺高血压 (EIPH) 的预测因子.
主要方法:
- 预期招募91名患者 (60名中度至重度MR患者,31名对照患者) 保持LVEF (≥60%).
- 休息和压力的表现 (自行车人体) 心声学与斑点跟踪离线分析.
- 评估LA体积指数,储,导管和收缩功能,以及NT-proBNP度和肺动脉压力.
主要成果:
- 与对照人群相比,患有MR的患者在压力期间表现出更高的LA体积指数和更低的LA储,导管和收缩分数.
- 静止时的LA变形参数相似,但压力显示了LA功能的显著差异.
- 静脉动脉体积指数与静脉静脉动脉压 (SPAP) 在休息和压力期间相关联.
- 较高的NT-proBNP水平与在高峰压力期间增加LA体积和减少LA功能有关.
- 预测EIPH的LA体积指数,LA喷射分数 (EF) 和静止状态的填充指数.
结论:
- 在患有原发性MR和保存LVEF的患者中,左心房参数发生显著变化,与肺动脉压力和NT-proBNP相关.
- 应力回声心电图和斑点跟踪分析有效地揭示了在炼期间的LA功能受损.
- 在这个人群中,LA体积指数,LA EF和LA填充指数是运动引起的肺高血压的有价值预测指标.
关键词:
在左心房的左心房.主要的 mitra 反.斑点跟踪回声心脏图谱 (speckle-tracking echocardiography) 是一种跟踪斑点的回声心脏图谱.压力回声心脏成像 (Echocardiography) 是一种压力回声心脏成像.更多相关视频
08:10Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
1.7K
08:21Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice
Published on: June 15, 2020
4.2K
相关概念视频
Regulation of Stroke Volume
3.2K
The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
3.2K
Imbalances in Cardiac Output
1.4K
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
1.4K
