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心脏T1映射非ST段升高心肌梗塞:心肌纤维化时间变化

Luis Paiva^1,2, Maria João Ferreira^1,3,4, Sónia Afonso^3,4

¹Centro Académico e Clínico de Coimbra (CACC), Coimbra, Portugal.

Frontiers in cardiovascular medicine

|June 9, 2025

概括

心脏磁共振成像显示,随着时间的推移,非ST升高心肌梗塞 (NSTEMI) 影响的心脏区域的晚期加多增强 (LGE) 减少. 然而,细胞外体积分数 (ECV) 测量没有显著变化,表明稳定的扩散纤维化.

科学领域:

心脏病学心脏病学
医疗成像医学成像
生物医学工程生物医学工程

背景情况:

非ST升高心肌梗塞 (NSTEMI) 可能导致心肌纤维化,影响心脏功能.
心脏磁共振 (CMR) 成像技术,包括晚期加多增强 (LGE) 和细胞外体积分数 (ECV),用于量化心肌纤维化.
了解NSTEMI后纤维化的时间演变对于患者管理和风险分层至关重要.

研究的目的:

在4年的随访期内评估NSTEMI患者LGE和ECV的变化.
评估MI罪祸首冠状动脉和心肌偏远区域对纤维化进展的影响.
调查多血管冠状动脉疾病 (CAD) 和纤维化变化之间的关联.

主要方法:

这是一项针对30名1型NSTEMI患者的前性单中心研究.
综合评估包括冠状动脉血管学,侵袭性冠状动脉生理学和生物标志物.
在基线和4年随访时进行CMR成像,以评估左心室 (LV) 体积,功能和心肌纤维化 (LGE和ECV).

主要成果:

在四年内,LV质量,体积和收缩率保持稳定.
总体上观察到LGE的显著下降趋势 (p=0.051),特别是MI罪祸首动脉区域 (p=0.015).
70%的患者出现LGE体积回归;ECV测量显示没有显著变化. 远程心肌中没有LGE或ECV的显著变化,无论多血管CAD.

结论:

在NSTEMI之后,肌肉纤维化,根据LGE的评估,在4年内,心脏病相关区域的肌肉纤维化呈现回归趋势.
扩散性心肌纤维化,以ECV表示,在NSTEMI后保持稳定.
多血管CAD似乎不会影响偏远地区心肌纤维化的变化.

关键词:

心脏磁共振是一种心脏磁共振.细胞外体积分数的体积分数后续行动后续行动晚期加多增强的加多增强绘制地图,绘制地图.微循环是一种微循环.非ST升高的心肌梗塞.

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