This is something to ask his doctor. You can do that, have the doctor explain exactly what happened and why. It may have been an arrhythmia problem where the heart wasn't beating normally. In some cases, especially younger people, that can cause death. Or an arrhythmia can cause blood clots which will cause a blockage and heart attack. Valve problems, obesity, family cholesterol problems can all lead to heart attacks. Only the doctor knows for sure what happened and why.
I'm so sorry about the loss of your son. I can't imagine the pain you're feeling right now.
He died of a massive heart attack. We have had no family member with heart disease, so we do not know where he got this from. he was only 29 yrs old
I am very sorry about your son! How he died? Heart attack? Heart failure? What the hospital said? Please tell us more and we try to answer more.
You have my sincere sympathy.