Can you tell me if a friend waited 6.5 hrs. in the er with staff knowing he had a heart attack before stent was put in, is that okay?

Depends: Depends on history, presentation, physical exam, bloodwork and ecg. There are certain types of heart attacks that should be attended to emergently/urgently and others that could wait hours to perhaps days before cardiac procedure is done. Medical therapy should be given to everybody.

They most probably: Were very busy- if he is symptom free after procedure things are good-give thanks for proper care!