心肌缺血后心肌水肿的磁共振成像研究进展

MRI Progress of Myocardial Edema after Myocardial Ischemia

心肌水肿是缺血性心肌病最常见的病理生理改变之一,磁共振成像(MRI)能评估缺血后心肌水肿的形态和程度。该文综述了MRI对缺血性心肌水肿的分析方法,阐述了其临床应用价值和局限性。其中,T2加权像、23Na MRI可对心肌水肿的形态做出评价,而心肌水肿的弥散加权成像、T2映射、钆对比剂注射后早期成像等技术已日益成熟,可进一步定量评估组织水肿的程度,且能够先于形态学检测到心肌信号的变化。这些分析对缺血性心肌病的病程发展及临床治疗结果的判定很有意义。

Myocardial edema is one of the most common pathological and physiological changes of ische-mic cardiomyopathy.Magnetic resonance imaging （MRI） can assess the morphology and degree of myocardial edema.Here reviews the clinical values and limitations of several MRI technologies for the ischemic edema . T2WI,GE-MRI,Na MRI can evaluate the morphology of myocardial edema,and with the continuous develop-ment of MRI technology,such as DWI,T2 mapping,early imaging after gadolinium contrast administration, quantitative evaluation for myocardial edema being mature ,changes of myocardium signals prior to morphology can be detected,which is very helpful to detect the progression of ischemic cardiomyopathy and to judge the clinical outcome.