discontinuing herceptin treatment

[pie]

I have been reading all of the posts on this site all during my treatment for breast cancer and found them to be very helpful. I received a call from my cardio doctor's office after my last echo cardiogram and the nurse said that they found leakage from the mitral valve. I asked if this was herceptin related but she didn't think so. Has anyone stopped treatment because of this problem? I know that herceptin can affect heart function. I;m going to try and speak with the doctor soon.