Fig. 1From: Ventricular fibrillation immediately after the treatment of Graves’ disease coexisting with atypical angina and long QT syndrome: a case reporta Twelve-lead electrocardiogram on initial medical examination. b Electrocardiogram 10 min after administration of landiolol. Ventricular fibrillation was initiated by the R-on-T phenomenon of ventricular ectopic beat. c Electrocardiogram of ventricular fibrillationBack to article page