Brug af anden medicin).
(ECG, electrical recording of the heart) changes, have salt imbalance in the blood, especially low concentrations of potassium in the blood (hypokalaemia) which are currently not corrected by treatment, have a very slow heart rate (bradycardia), have a weak heart (heart failure), have a history of abnormal heart rhythms (arrhythmias), or you are taking other medicines that result in certain abnormal ECG changes (see section Taking other medicines).