If VF/pVT remains after the first defibrillation, what is the next step in the algorithm?

• A. Resume CPR, epinephrine every 3-5 minutes, and consider amiodarone 300 mg after the second defibrillation
• B. Immediately reattempt defibrillation at higher energy without CPR
• C. Stop CPR and await ROSC
• D. Administer lidocaine only

Answer: (A)

When a shockable rhythm persists after the first defibrillation, the priority is to maintain perfusion while continuing to pursue defibrillation. The next step is to resume high-quality CPR immediately for about 2 minutes, then prepare for the next shock. During CPR, give epinephrine every 3-5 minutes to improve coronary and cerebral perfusion pressure, which helps create conditions favorable for ROSC. If the rhythm remains VF or pulseless VT after the second defibrillation, administer amiodarone 300 mg IV/IO to help stabilize the heart and reduce further recurrence of malignant arrhythmias. This approach combines ongoing perfusion with antiarrhythmic support to increase the chances of a successful outcome. Skipping CPR, stopping efforts to wait for ROSC, or using lidocaine only does not align with the recommended sequence for refractory VF/pVT.