Answer
HER2-blocking treatments can reduce the heart's pumping function, sometimes without early symptoms, so function is checked before and during treatment.
Sources for this answer
- Perjeta 420 mg Concentrate for Solution for Infusion — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.