[Polymorphic ventricular tachycardia of torsade de pointes type in patient with schizophrenia treated with thioridazine].

A case of 82 year-old female with schizophrenia treated with thioridazine with a long QT syndrome and polymorphic ventricular tachycardia of torsade de pointes type was presented. Additional predisposing factor for cardiac arrhythmia was diarrhea with subsequent hypokalemia. Infusion of magnesium sulphate, potassium supplementation and thioridazine discontinuation was effective management of the pathient.