Objective:To evaluate the echocardiography and magnetic resonance imaging (MRI) appearances of arrhythmogenic right ventricular cardiomyopathy /dysplasia (ARVC

ARVD) in order to improve the recognition. Methods:Detailed echocardio- grams and MRI were performed in two patients who fulfilled the criteria of the Task Force of the European Society of Cardiol- ogy and International Society and Federation of Cardiology(ESC/ISFC) for ARVD diagnosis

Right ventricular(RV) chamber di- mensions

RV function

and the presence of morphologic ahnormalities were assesed. The patients underwent detailed electro- physiological evaluation and RV bipolar electrogram voltage mapping;radiofrequency ahlation was performed as linear lesions in conjunction with simultaneous CARTO-guided catheter mapping. Results:The RV dimensions were significantly increased;focal RV localized aneurysm and hyper-reflctive moderator band were present in hoth two patients with echocardiograms. RV en- largement and trabecular derangement also were suggested by MRI. The area of abnormality suggested by images and elec- troanstomic voltage mapping were identical. Results:Noninvasive detection of RV structural alterations and functional changes in ARVD is possible by echocardiography and MRI

and these changes may be used as the major criteria for the diagnosis of ARVD.