I have no advice about your PVC's, but I would suggest you get a second, third, and perhaps fourth opinion on your "inoperable" aneurysm. I'd suggest first the Cleveland Clinic, then my surgeon, Vincent Gaudiani (CA), and Craig Miller (CA). Gaudiani and Miller both can easily be found on the web. Miller is at Stanford and Gaudiani is/was at Sequoia Hospital in Redwood City, CA. If all three of them concur that your condition is truly inoperable, only then would I believe it.
FWIW, note that the doctor's response in the main forum is essentially the same as mine - get other opinions on your condition. Good luck.