[Torsade de Pointes tachycardia during sotalol treatment of a patient with normal potassium levels].

Proarrhythmia in the form of Torsade de Pointes tachycardia (TdP) is a well-known complication of sotalol treatment. It most often occurs in the setting of sotalol overdosing, renal impairment, bradycardia, hypokalaemia, hypomagnesiaemia or lengthening of the QT-interval due to other drugs. TdP is reported without these predisposing factors. In the described case, TdP might be facilitated by bradycardia and by potassium depletion without concomitant hypokalaemia after diuretic treatment.