在非缺血扩张性心肌病中突然心脏死亡的风险分层:在心脏MRI中心律失常基质评估
Di Zhou1, Huaying Zhang1, Wenjing Yang1
1Department of Magnetic Resonance Imaging, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Radiology
|September 9, 2025
概括
在非缺血性扩张性心肌病 (DCM) 中,心脏MRI与至少7.2%的晚期加多增强 (LGE) 强烈预测了突然心脏死亡 (SCD) 风险. 细胞外体积分数 (ECV) 进一步细化了风险分层,特别是在模两可的情况下.
科学领域:
- 心血管成像 - 心血管成像
- 心脏磁力共振成像 (MRI)
- 节律失调的基质分析
背景情况:
- 晚期加多增强 (LGE) 和MRI上的细胞外体积分数 (ECV) 识别了非缺血性扩张性心肌病 (DCM) 中的突然心脏死亡 (SCD) 风险.
- 在DCM患者中,LGE和ECV的比较预后值需要进一步澄清.
研究的目的:
- 评估LGE和T1映射在DCM中的SCD的预测性能.
- 探索这些MRI参数对于风险分层的临床实用性.
主要方法:
- 心脏MRI在四个中心对1105名DCM患者进行.
- 在开发队列 (n=837) 和验证队列 (n=268) 中分析了数据.
- 主要终点:SCD,适当的ICD冲击,或恢复性心脏骤停.
主要成果:
- 在调整后的分析中,LGE≥7.2% (HR,4.75),ECV≥31.8% (HR,2.91) 和原生T1z-score≥2.1 (HR,1.69) 预测了SCD事件.
- LGE ≥7.2%表明高SCD风险 (年度事件率,4.65%) 无论ECV或T1值.
- ECV ≥31.8%,没有LGE的风险高于LGE<7.2%或焦点/中壁LGE.
结论:
- 在非缺血性DCM中,LGE≥7.2%是SCD风险的强有力的预测指标,独立于模式或分布.
- ECV显著改善了SCD风险分层,特别是在缺席或不广泛的LGE患者中.
- 整合LGE和ECV的工作流可以提高DCM中的临床SCD风险评估.
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