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Figure 3 (A) Right ventricular end-diastolic volume was significantly greater in patients with arrhythmogenic right ventricular dysplasia (ARVD) compared with idiopathic ventricular tachycardia (VT) and control subjects. No differences were noted in the left ventricular end-diastolic volumes. (B) Right ventricular ejection fraction was significantly lower in patients with ARVD compared with idiopathic VT and control subjects. No differences were noted in the left ventricular ejection fraction.