在患有大动脉缩的儿童和年轻成年人中进行非侵入性组织表征 - 基于MRI的前性研究
Tobias Giertzsch1, Michael Jerosch-Herold2, Philipp Schneider3
1Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Cardiovascular diagnosis and therapy
|May 19, 2025
概括
严重的大动脉缩 (CoA) 与心肌细胞外体积分数 (ECV) 和原生T1的升高有关,这表明有不良组织重塑. 患有冠状动脉炎的患者,特别是严重的病例或双主动脉 (BAV) 患者,面临更高的心脏并发症的长期风险.
科学领域:
- 心血管成像 - 心血管成像
- 心脏核磁共振成像 (MRI) 的使用.
- 心肌组织的特征鉴定
背景情况:
- 大动脉缩 (CoA) 需要终身监测晚期并发症,如复缩,动脉瘤,心律失常和心力衰竭.
- 了解心肌组织层面的不良左心室 (LV) 改造对于预测COA患者初始心力衰竭至关重要.
研究的目的:
- 用先进的心磁共振 (CMR) 成像来评估CoA患者心肌组织特征.
- 为了识别不良组织重塑的标记物及其与疾病严重程度的相关性,双主动脉 (BAV) 和血压 (BP) 药物使用.
主要方法:
- 利用3特斯拉CMR成像测量心肌细胞外体积分数 (ECV),本地T1和细胞内水寿命 (τic) 通过T1映射在46名COA患者和14名对照中.
- 根据流速,复缩,高血压和药物治疗,将CoA分类为低等级 (LG),严重 (sCoA) 和CoA与BAV.
- 从电影CMR序列获得的LV体积,质量和射出分数.
主要成果:
- 与LG CoA和健康对照相比,严重的CoA (sCoA) 和BAV的CoA显示出显著更高的ECV和原生T1值,表明心肌纤维化增加.
- 细胞内水寿命 (τic) 在LG CoA中较低,表明心肌细胞直径较小,相比于sCoA和CoA与BAV.
- 与LG和sCoA组相比,BAV组观察到LV末缩体积 (ESV) 的增加. 抗高血压药物与较低的原生T1和tic有关.
结论:
- 严重的CoA与肌肉心脏ECV和本地T1的升高有关,反映了不良的组织重塑和心力衰竭,扩张功能障碍和心律失常的长期风险增加.
- 同时在LG CoA患者中服用BAV表明与单独的LG CoA相比,心肌纤维化扩散较大.
- 抗高血压疗法可以减轻不良改造,减少心肌细胞缩和Coa患者间歇性纤维化.
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