Did you ever have a MUGA scan to check your EF?I've been on Herceptin for every week for the past 10 months (plus 8 weeks 16 months ago) & my EF has decreased by 20%.I think the big concern is when it drops below 25%.Fortunately, I'm not experiencing any symptoms!However, my onc wants me to see a cardiologist.
Are you taking CoQ10?Many of us do for cardio-protective reasons.
Take good care,
Jessica