Hm.
I`ve had a number of patients, I propably "saved" the life of a significantly smaller number of them, none of that made me a hero though.
I`ve put some thought into this hero/bravery thing before (though more in a general context than in an EMS one), dunno, it`s really hard to define.
I guess a heroic act is something that comes along with a cost or risk for oneself (life, all sorts of personally valued things) in oder to acchieve or accomplish that "heroic" act.
Also, the person performing that act of bravery or heroicism shouldn`t be under any obligation of whatsoever to do so.
For example that would exclude certain jobs, positions, etc that need you to do tasks as a part of the job. But if you have no other way to save yourself but to do that act, it ain`t real bravery either, it`s more about the natural life-saving instinct/reflex.
So it`s all about something you don`t need to do, that comes with a (possible) prize/risk, and that you still willinlgy do.