I'm so sorry you have this worry.
It sounds as if he might need a pacemaker and if this has not been assessed your BIL should be tested - insist if need be.
My DH was treated for several years for asthma which he had had had diagnosed correctly years before but never reassessed, though I knew that heart failure had developed. He chose - understandably - to believe the asthma till he had a heart attack - luckily in France with excellent care and the required stent.
Please don't let your BIL wait for an emergency.
No fun being old under Andy Burnham .
Struggling with estrangement from 2 adult children and dont know where to go from here.


