It said she died of a heart attack after contracting bronchitis! Scary to think that something so minor can kill a person at a relatively young age given our medical system.
Watch your health, folks
People of her age and stature, on the other hand, suffer cardiac arrest from rather more predictable causes.
Sudden cardiac death in younger people/athletes is usually due to hypertrophic obstructive cardiomyopathy, a congenital defect. In older people it is usually due to ventricular arrhythmias, which can have their own etiologies.
Death resulting from an MI is typically more gradual, usually actually from complications of heart failure b/c the heart simply can't pump as well.