Donna, I hope your mom's MUGA score is acceptable, but as Sheila says, follow up with an Echocardiogram if necessary for comparasion. Also, something I've observed during my years on Herceptin, if I have my MUGA or Echo within a week after my Herceptin, the numbers are lower than if I wait until just BEFORE my next scheduled Herceptin. Don't know if it's coincidence or not, but I try to have my test as far out from the last Herceptin as possible
<3 Lolly