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Evaluation the role of myocardial perfusion of MRI and MR cine in acute coronary syndrome
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 8
- DOI:
- 10.3760/j.issn:1005-1201.2002.08.008
- Key Word:
- 冠状动脉疾病;心肌再灌注;心肌梗塞;磁共振成像
Abstract： 目的评估心肌灌注MRI和MR电影在急性冠状动脉(简称冠脉)综合征中的应用价值.方法急性冠状动脉综合征患者55例,再灌注治疗3～6个月后,进行心脏MR影像检查.真正快速稳态梯度序列(FIESTA)用于观察心肌运动;快速梯度回波序列(FGRE ET)用于观察首过时相心肌灌注的MRI特征;反转恢复梯度回波序列(MDE)用于观察延迟时相心肌灌注MRI特征.结果55例中38例患者可见位于心内膜下心肌的首过灌注缺损,其信号强度相对值显著低于周围心肌.心肌灌注延迟时相MRI示51例患者心室壁内存在不同范围的强化灶,其信号强度值是周围心肌的4.36倍(t=1.69, P<0.05).心室壁内所存在的延迟强化灶范围和信号均匀程度与心室壁运动能力显著相关(非标准相关系数分别为-42.195、-101.750,标准相关系数分别为-0.377、0.425;t分别为-5.735、-5.445,P值均<0.001).结论梗死心肌于MR心肌灌注延迟时相呈现显著强化.通过综合分析延迟强化,运动能力显著降低和可能存在的首过灌注缺损,可以更有效地识别梗死(或瘢痕)心肌.
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