 FACT: At the end of the movie, Robert takes unconscious Amy out of  the hospital. The cardiac monitor shows absence of cardiac  electrical activity, i.e. asystole. Asystole is a type of cardiac  arrest classified as "non shockable rhythm" and its initial  management exclude the use of defibrillation. They should have  started cardiopulmonary resuscitation (CPR) maneuvers instead.  Furthermore, when an electrical shock is delivered, a typical  waveform should have appeared in the monitor.