Wishing Chelsea the best and a easy solution.
It's amazing what we can do for our furbabies now with holter monitors, pace makers and meds. Though I am sure it sounds very concerning for you I would be worried too, come to think of it would probably of ended up with a migraine like you did, guess our stressors come out the same way hehe
But I also deal with a lot of patients that have problems with electrial conduction disorders. We take care of them along with other cardiac patients and I am confident you'll find a great cardiologist to care for Chelsea and guide you through all this.
Keeping you both in my daily prayers.