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Gd-DTPA对比度增强与心肌梗塞外围和中心区域内热应之间的关系

B L Gerber1, C E Rochitte, D A Bluemke

  • 1Cardiology Division, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA.

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概括

与对比度增强的MRI模式预测了心肌梗塞后的心肌活力. 在正常增强的功能失调的心肌中存在内热储备,但在延迟的超增强中受到心脏病转移性的影响.

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科学领域:

  • 心血管成像 - 心血管成像
  • 磁共振成像是一种磁共振成像技术.
  • 心肌梗塞的心脏病发作

背景情况:

  • 在急性心肌梗塞 (MI) 中,对比度增强 (CE) 的MRI模式对于预测心肌活力有争议.
  • 早期的低增强和延迟的超增强是CE MRI的关键模式.
  • 评估CE模式与区域内热带反应之间的关系至关重要.

研究的目的:

  • 为了研究CE MRI模式与肌肉梗塞中低剂量多布他胺的区域内回应之间的关系.
  • 确定CE模式在区域一级预测心肌活力的临床意义.

主要方法:

  • 患有心脏病的13只狗接受了CE,并在休息状态和多布他胺输液期间进行了MRI标记.
  • 对每只动物的96个细分部分进行了CE模式和3D区域菌株的分析.
  • 功能障碍的细分部分根据CE模式进行分类,以评估因诺托普反应.

主要成果:

  • 功能失调的心肌与正常的CE模式显示显著改善的辐射加厚和周长缩短菌株.
  • 患有早期低增强的心肌没有表现出显著的内回应.
  • 延迟超增强性心肌肌肉显示出由心脏病发作转移性影响的可变性内回应.

结论:

  • 在正常CE的功能失调的心肌中存在内热储备,但在早期的低增强时没有.
  • 丧尸转移度的程度会影响延迟高增强性心肌的内反应.
  • 脑电脑核磁共振 (CE MRI) 是一种有价值的工具,用于检测心肌梗塞后的心肌活力.