ABSTRACT
Objective To explore the MRI characterisitics of primary dilated cardiomyopathy and isolated left ventricular non-compaction.Methods The patients who were diagnosed as primary dilated cardiomyopathy (n=18) and isolated left ventricular non-compaction (n=10) were enrolled,and the MRI was performed.The thickness of non-compaction myocardium (NC),compaction myocardium (C) in end-diastole,the feature of movement of myocardium,the number of non-compaction segment,the fraction shortening of non-compaction and the distribution were compared.Results Totally 823 segments were analyzed in primary dilated cardiomyopathy,in which 124 segments were non-compaction myocardium;397 segments were analyzed in isolated left ventricular non-compaction,in which 115 segments were non-compaction myocardium.The NC,NC/C,NC/(NC+C),and the fraction shortening of the isolated left ventricular non-compaction patients were higher than those of primary dilated cardiomyopathy patients (all P＜0.05).The features of distribution showed that the apical segment was mostly involved,and the basal segment was less involved or hardly involved.The anterior and lateral segments were more involved in the free wall,the septal was less involved.Conclusion The MRI characteristics of primary dilated cardiomyopathy and isolated left ventricular non-compaction are different,especially in the distribution,non compacted segments,NC and NC/C,which is important for diagnosis and differential diagnosis of the two diseases.