Although there were probably many contributing factors to his heart attack, I believe stress was the fuel.
How long has it been since you checked your stress level? Here is something you may consider if you feel an overwhelming amount of pressure.
Pull out a piece of paper and evaluate the stress sources. I call this the 5 Bypass Activity.
What is causing your stress? Rank these in order of highest stress factor to lowest.
1. Is it your job? (Specific projects or people?)
2. Is it your family (Problems with your children, spouse, or parents?)
3. Is it a church responsibility? (Not enough time to accomplish it all?)
4. Is it volunteer responsibilities? (Concerns about the welfare of others outside your immediate control?)
5. Is it something else? (Something within or without of your control?)
Once you have these identified, it will be clearer to evaluate possible solutions to these problems.