Which drug is recommended during resuscitation for persistent VF/VT after initial defibrillation attempts?

• A. Amiodarone
• B. Epinephrine or Vasopressin
• C. Lidocaine
• D. Atropine

Answer: (B)

During CPR for a persistent shockable rhythm after defibrillation attempts, the focus is on improving perfusion to the heart and brain. A vasopressor is given to raise coronary and cerebral perfusion pressures while chest compressions continue. Epinephrine is the standard choice because its alpha-adrenergic effects cause vasoconstriction, which elevates aortic diastolic pressure and improves coronary perfusion, increasing the likelihood of return of spontaneous circulation. Vasopressin can be used as an alternative or substitute for an epinephrine dose in some protocols, providing another mechanism to achieve the same goal of boosting perfusion during ongoing CPR.

Antiarrhythmics like amiodarone or lidocaine are considered to help terminate refractory VF/VT but are not the primary agents for perfusion during ongoing resuscitation. Atropine is not indicated for shockable rhythms and is used mainly for bradycardia.