心肌应变和细胞外体积之间的关系:在患有严重大动脉狭窄症的患者中进行探索性研究,接受光子计数探测器CTCT
Costanza Lisi1,2,3, Victor Mergen1, Lukas J Moser1
1Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, CH-8091 Zurich, Switzerland.
Diagnostics (Basel, Switzerland)
|January 25, 2025
概括
光子计数检测器CT可以评估大动脉狭窄患者的心肌纤维化和应变. 细胞外体积和全球纵向菌株可能有助于在TAVR之前识别心脏粉样性和减少收缩性.
科学领域:
- 心脏病学 心脏病学
- 放射学 放射学是一门学科.
- 医疗成像医学成像
背景情况:
- 大动脉狭窄 (AS) 与扩散性心肌纤维化和改变的变形有关,影响预后.
- 评估这些因素对于管理严重AS患者至关重要.
研究的目的:
- 用光子计数检测器CT (PCD-CT) 检查严重AS患者的心肌应变和细胞外体积 (ECV) 之间的关系.
- 探索PCD-CT参数在识别特定心脏病和功能障碍方面的实用性.
主要方法:
- 对77名严重AS患者进行PCD-CT进行TAVR计划的回顾性分析.
- 通过冠状动脉CT血管学 (CCTA) 的特征追踪评估心肌菌株.
- 肌肉心脏ECV是根据心脏光谱晚期增强扫描计算的.
主要成果:
- 与其他患者相比,心脏粉症患者的心肌中部ECV较高,但与之相似.
- 心肌梗塞患者的整体纵向应变减少,但心电脉动不变.
- 在心肌张力参数和CT衍生的射出分数之间发现了显著的相关性.
- 低流量,低梯度AS患者表现出较低的全球纵向菌株和相关的ECV梯度.
结论:
- 在严重的AS患者中,PCD-CT成像可以量化心肌心脏ECV和应变.
- 脑电图和全球纵向菌株 (GLS) 显示出检测心脏粉症的潜力.
- 这些参数可能有助于识别TAVR之前心肌收缩率降低的患者.
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