Answer
Potassium affects the heart's electrical activity. An ECG may be appropriate when deficiency is significant or when cardiac disease, digitalis treatment or excessive potassium is a concern.
Sources for this answer
- Potassium Chloride 7.5% w/v Syrup — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.