Objective To evaluate the differential diagnosis value of Cardiovascular magnetic resonance imaging tissue tracking technique(CMR-TT)in myocardial amyloidosis(CA)and other left ventricular hypertrophy diseases(LVH).Methods A total of 125 patients with left ventricular hypertrophy who underwent CMR examination were continuously col-lected,including 34 CA,47 HCM and 44 HHD cases.Standard cine images of the heart were acquired in all patients using 3.0T MR.Bilateral ventricles global strain was measured by using CMR-TT.Receiver operating characteristic(ROC)curves were used to evaluate the diagnostic efficacy of strain parameters alone and in combination.Results The LGLS,RGRS,and RGCS in CA group were lower than those of HCM group(P＜0.05),and the bilateral ventricular strain param-eters in the CA group were lower than those of HHD group(P＜0.05).In the ROC curve analysis,RGRS had the best di-agnostic performance in the CA-HCM group,with AUC 0.753;LGLS had the best diagnostic efficacy in the CA-HHD group,with AUC 0.809.The combination of strain parameters has improved the diagnostic efficacy.The combination of bilateral ventricular strain has the best diagnostic efficacy in CA-HCM group and CA-HHD group,with AUC 0.935 and 0.847.Conclusion The biventricular strain parameters measured by CMR-TT technique have certain value in differentiating CA from HCM and HHD.
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