In 1976 , ten years after his first heart attack , he underwent heart bypass surgery .
A heavy smoker , Matthau had a heart attack in 1966 , the first of at least three in his lifetime .
In 1976 , ten years after Matthau 's first heart attack , Matthau underwent heart bypass surgery .
A heavy smoker , Matthau had a heart attack in 1966 , the first of at least three in his lifetime .