Background-Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is characterized by frequent life-threatening ventricular arrhythmias, diagnosed on average in the teens to mid-50s and commonly treated by implantable cardioverter defibrillators (ICDs). As younger age and high frequency of ICD discharges are risk factors for difficulties in psychosocial adjustment, we developed a study to assess psychosocial adjustment among patients with ARVD/C and to determine risk factors for poor adjustment in this high-risk population. Methods and Results-Eighty-six adults enrolled in the Johns Hopkins ARVD Registry (38 male; mean age, 45.4Ϯ12.9 years), with an ICD in place for a median 3.2 years (range, 0.2 to 20