Answer
Ivabradine acts on the sinus node, and its licensed uses require sinus rhythm. It may be ineffective when rhythms such as atrial fibrillation interfere with sinus-node function.
Sources for this answer
- Ivabradine 7.5mg film-coated tablets — Current selected SmPCemc · Summary of Product Characteristics
- Procoralan — 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.