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在先天性心脏病中降低胎盘血管反应能力,使用血氧水平依赖的MRI量化

Vidya Rajagopalan¹, Valeria Rosas¹, Riya M Patel²

¹Division of Cardiology, Department of Pediatrics, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, California, USA.

Magnetic resonance in medicine

|November 2, 2025

概括

在患有先天性心脏病 (CHD) 的怀孕中,胎盘血管活性 (PLVR) 降低,表明胎盘功能受损. 这项大胆的MRI研究显示,与健康对照人群相比,患有心脏病的胎儿的PLVR较低.

科学领域:

心血管成像 - 心血管成像
胎儿医学胎儿医学
胎盘生物学胎盘生物学

背景情况:

胎盘病理与不良胎儿结果有关,包括先天性心脏病 (CHD).
在CHD怀孕中的体内胎盘功能障碍仍然不太了解.
大胆的MRI提供了一种评估胎盘血管活性 (PLVR) 的方法.

研究的目的:

为了比较PLVR,对母体二氧化碳变化的胎盘反应的测量,在有和没有胎儿心血管疾病的怀孕之间.
在胎儿心血管疾病的背景下,在体内表征胎盘功能障碍.
调查PLVR与孕产妇健康风险之间的关系.

主要方法:

使用胎盘BOLDMRI和同时进行母体终潮二氧化碳 (EtCO2) 监测的前性研究.
通过将MRI信号与EtCO2刺激进行比较的一般线性模型计算PLVR.
全球PLVR确定为平均voxel-wise PLVR;用于关联的回归分析.

主要成果:

包括103名孕妇 (31名患有心脏病,72名对照).
在CHD组 (0.024 ∆BOLD/mmHg CO2) 与非CHD组 (0.03 ∆BOLD/mmHg CO2) 相比,观察到较低的PLVR.
母亲糖尿病对CHD与非CHD怀孕中的PLVR产生了差异性影响.

结论:

在CHD怀孕中提出了胎盘功能障碍的新体内特征.
降低CHD怀孕中的PLVR表明胎盘血管完整性受损.
这些发现证实了先前的胎盘异常在心血管疾病的基因病理证据.

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