Thought I'd do a quick update, mainly because many people will post if they are having issues but most don't if they are not.
In the first week I had a migraine aura twice but heart was fine. Started walking in to town after 3 days and back working from home 5 days later. Only issue I had was the wound had a slight infection, probably because I needed a stitch, a week of antibiotics from the go sorted it.
After 4 weeks I started riding my bike on turbo trainer, just easy 39 minutes efforts stepping up to full on 90 minute ones this week. Absolutely no AF or other heart issues other than max HR appears to be down by 15bpm which I've read is common.
Of course my heart is still healing so not out of woods yet, and please don't take this a some sort of one upmanship, just wanted to provide balance for those who may search in the future.