：Thyroid hormones have been widely accepted to have complex effects on myocardium by regulation of ion channel, autonomic nervous system, non-specific inflammatory infiltration, therefore predisposing to reversible myocardium damage and multiple arrhythmias [1-3]. However, atrial fibrillation (AF), advanced to irreversible complete heart block, QT (QTc) prolongation, torsade de pointes (TdP), ventricular flutter and fibrillation (VF) have never been reported at the same time in a patient with hyperthyroidism before.