The ACLS certified nurse determines a patient is in PEA. CPR is in progress. Three minutes after epinephrine 1 mg is given, PEA continues. Which action should the nurse do next?

Choice C rationale According to ACLS guidelines for pulseless electrical activity, epinephrine should be administered every 3 to 5 minutes. Since three minutes have passed since the last dose and the patient remains in a pulseless state, the next pharmacological step is to give another 1 mg dose. Epinephrine works via alpha-adrenergic vasoconstriction, which increases coronary and cerebral perfusion pressure during CPR. Continued administration is vital to attempt to restore a perfusing rhythm while high-quality chest compressions and ventilations continue. Choice A rationale Transcutaneous pacing is generally not recommended or effective for pulseless electrical activity or asystole. PEA involves organized electrical activity that fails to produce a mechanical contraction, often due to underlying causes like hypovolemia or tension pneumothorax. Pacing the heart electrically does not address the mechanical failure or the underlying pathology. Efforts should instead focus on high-quality CPR, epinephrine administration, and identifying and treating the reversible causes, often referred to as the H's and T's. Choice B rationale This medication was previously used in ACLS protocols for asystole or slow PEA to block parasympathetic influence and increase heart rate. However, current evidence-based guidelines have removed it from the cardiac arrest algorithm because it has not been shown to improve outcomes like return of spontaneous circulation or survival to discharge in these specific rhythms. Its use is now primarily reserved for symptomatic bradycardia with a pulse, rather than pulseless arrest scenarios like PEA. Choice D rationale This drug is an inotrope and vasopressor used to treat symptomatic bradycardia or hypotension after a return of spontaneous circulation has been achieved. It is not used during the active "code" or pulseless phase of a PEA arrest. The primary focus during cardiac arrest is on epinephrine and effective compressions. Once a pulse is restored, if the blood pressure remains low, a dopamine infusion might be considered to support the patient's hemodynamic status and output.