Hi Vicki, I completely understand your concerns. I had a loss of heart function while taking Herceptin and like you it was picked up during one of the regular scans. I was also feeling very tired and a little breathless. My oncologist referred me to a cardiologist and I was put on heart tablets for the remainder of my treatment. I also had a short break from treatment while all that was being sorted out. I was able to complete the 12 months but had tighter monitoring from both the oncologist and cardiologist during that time. I stayed on the heart tablets for some months after I finished and my heart function improved and although not back to pre-treatment levels it is well into the normal range and I no longer see the cardiologist.
If you are concerned about any of your symptoms while you are waiting to see your oncologist head into the hospital so they can check you out. It sounds as though your oncologist is on to it and hopefully they can give you some reassurance and guidance when you see them next week. Best wishes, Jane xx