Answer
Propafenone changes cardiac conduction and can occasionally cause or worsen an arrhythmia. ECGs help assess effectiveness and detect concerning conduction or Brugada-like changes.
Sources for this answer
- Arythmol 150mg Tablets — 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.