After the vet determined that her thyroid levels are still within normal
limits and have remained consistent now for several years, she did another
ultrasound and an EKG and the results show that there has been no change in
her heart in those years. (She had an ultrasound of her heart just after
going on medication to correct her thryoid because she began to have little
fainting spells that the vet said were due to tachycardia that had developed
from having the hyperthyroid undiagnosed for several years. The vete gave
her propanolol, a beta blocker, to keep her heart rate even and a bit slower
than it would normally be.)

All of this was done because the vet told me several months ago that the
heart problem was reversable in many cats with hyperthyroid and they could
be taken off the beta blockers.

However, my husband and I had a talk before I took Boo in for a final
consultation today, and we agreed that she has been frisky and appears
healthier and happier than ever before now, at age 12. Since she is doing so
well, he asked me to ask the vet what the benefits of taking her off the
propanolol were.

According to my vet, there really are no benefits to taking her off, except
having to purchase and give her one less pill a day. Some cats become
lethargic on beta blockers, but this has not been the case with Boo. And, I
have to give her thryoid medication twice a day anyway. The proper dose is
half a pill of each twice a day, so I just dose her right before I feed her.

We've decided to keep her on the beta blockers for now.

On the bad side, she howled and panted and raised such a fuss on the way to
and from the vet that I nearly had a heart attack. She also sank two claws
into the heal of my hand deep when I put it where she could touch it
throught he door of the cat carrier. I have never screamed and driven at the
same time before. She is fine now, as are the holes in my hand after some
peroxide.