I learned this AM a longtime college friend was in ICU/stable but critical condition. Later learned he passed around 7pm PDT.
I used to joke "at our ages, we meet for weddings. Later on it will be for funerals" And alas, time has caught us :-(
Word we are getting is "cardiac event" but not "heart attack" nor infection, nor... something else usual... Bottom line (my assessment), his heart just quit.
A good friend and fraternity brother of 30+ years succumbed this eve. At our mid 50's we are too damn young for this crap!
Godspeed & Tailwinds Brother!