This event repeats every year forever
He died of a presumed heart attack.
September 19, 2015 he said 'I was diagnosed hypertensive way back when I was 20. The condition remained for years, and became more acute with my cushings pit tumor. I still have high blood pressure, partially teated with three meds. I'll have to consult my doc and see if this may also be an issue.'
More information at https://cushingsbios.com/2016/05/08/in-memory-gregory-j-bart-jr-may-7-2016/