Don't know about the right ventricle. I'm assuming it may always operate at lower efficiency than left.
A 10 point drop isn't way out of line. I think some docs hold 45 as the cutoff.
I went from 65 to 56 after AC and could feel how much more tired I was. Started COQ-10 after rads and went to 70 MUGA.
Everything I have read says you will recover if it's Herceptin.
If you are done with chemo and rads, try COQ10. Perhaps you will be able to restart H in 6 weeks or so. In any case, your situation shows why one should be scanned every 3 months, at least in the beginning. Bev
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