Care Flight Entrance Practice Exam

The rhythm being tested is one where defibrillation isn’t appropriate because there’s no organized electrical activity to reset. In cardiac arrest, non-shockable rhythms include pulseless electrical activity and asystole, and the recommended initial management is high-quality CPR plus epinephrine to improve perfusion to the heart and brain during the arrest. Epinephrine helps create the conditions for a return of spontaneous circulation by boosting perfusion pressure even though it doesn’t reset the rhythm itself.

Ventricular fibrillation and pulseless ventricular tachycardia are shockable and require defibrillation, not epinephrine alone. Atrial fibrillation with a pulse isn’t managed as part of the arrest protocol with epinephrine alone. Therefore, the non-shockable rhythms treated with epinephrine in this context are pulseless electrical activity and asystole.