At the latest, I saw this movie in January of 2008 on TV. I'll describe what I remember and see if it rings any bells.
There were three adult men, including what I believe to be a father and a son. The adult son has been critically injured, so the two other men hold a clinic hostage. The third man in the group is volatile and even goes so far as to try and rape one of the female doctors, when the son flat-lines.
The doctor cannot save the son, but the hostages hide this by putting a heart monitor in their coat pocket.
The volatile man eventually notices this and attempts to shoot the man who put it in his pocket. The doctor shoots the volatile man, who falls to the ground, unconscious. The doctor immediately takes a scalpel, opens him up, then she slides her hand in and tries to restart his heart.
I don't remember anything beyond this. Does this ring a bell for anyone?
EDIT #1: To answer's Walt's questions, here's what I remember: I am pretty sure it was American, the production value was good and I watched it inside a hotel in Grangeville, Idaho. The rape scene had the man pushing the doctor's back against a shelf in the operating room, where she huffs and when the patient flatlines, she pushes her would-be rapist out of the way to try to resuscitate the man's heart, saying something like, "I don't have time for this."
EDIT #2: It is possible that the film involves two brothers, instead of a father and son.