A study suggests the obese may have a better prognosis after a heart attack. Dr. Crippen with his own take on the study:
The life time risk of heart attack is predominantly a function of the hand of cards you are dealt at birth. The fatties may have been lower risk at birth, but have brought the disease prematurely upon themselves. The thinnies were probably always high risk and, had they not looked after themselves, would probably have had their heart attack even sooner. Given that they were high risk from the beginning, and already have excellent lifestyles, there is not much more they can do but keep their fingers crossed.