I wonder how many of these "sudden deaths" smoked.
I was on 80 a day in Qatar for at least 12 years plus at least a case of dark rum a month.
A series of seven heart attacks stopped me smoking and bypass followed. Haven't touched fag since.
Diabetis is also a significant factor in heart attacks (I was diagnosed diabetic whilst in Qatar).
There are relaxation tapes available (probably on line).
I was given one in the UK in 1999 by my cardiac nurse and still use it regularly. Gives me a full and undisturbed deep sleep.