Hello Jessica,
You must have had trastuzumab and/or tykerb? If so you might want to read the below articles.
The incidence of atrial fibrillation with trastuzumab treatment: A systematic review and meta-analysis
https://pubmed.ncbi.nlm.nih.gov/30372591/
Long-term cardiac outcomes of patients with HER2-positive breast cancer treated in the adjuvant lapatinib and/or trastuzumab Treatment Optimization Trial
https://www.nature.com/articles/s41416-020-0786-x
Cardiologist follows the science to a new conclusion on fish oil supplements l Expert Opinion
https://www.inquirer.com/health/expe...-20210525.html
Nguyen