Hi and WELCOME to YT - I'm really glad you found us
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Yes, you are over-thinking - but hello...you're in VERY good company of a bunch of other overthinkers
! We're our dogs' health advocates so in my opinion, overthinking is a good thing as it causes you to consider everything AND do your research. The downside is that it can also cause a lot of fear -- and I'm totally guilty of being way over-fearful when it comes to my babies.
My bach degree is in nursing too (not practicing now)...so I totally understand how having that extra knowledge can sometimes almost make it worse, bc you've seen things go wrong and you know things that others don't.
You've done awesome research and to me, it sounds like you're all set - that pre-bloodwork is the right thing to do and will be reassuring.
The only thing that REALLY bothers me is why on earth they aren't doing IV fluids! Whenever my babies go under, even for a supposed "short" procedure, we always always always do IV fluids bc, as you know, if something *should* happen -- you WANT that access for ER meds etcetera. I would absolutely always insist on IV fluids for any/all general anesthesia procedures.
Now as far as the fear -- your kiddo will do great - I'm sure she will! As long as her bloodwork and EKG check out fine, you have a ton of reassurance right there and things should go very well. Dentals are very minor procedures and quick, so it should go great. If you weigh the risk of not doing a dental vs the risk of anesthesia...I think you'll come out wanting to do the procedure as dental issues can cause big problems if left unchecked (heart, as you know).
Hang in there, and let us know what you decide...have confidence that your kiddo will do great!!!