What is the correct sequence for managing a shockable rhythm (VF/VT) during cardiac arrest?

What is the correct sequence for managing a shockable rhythm (VF/VT) during cardiac arrest?

• A. Start CPR for 2 minutes, then defibrillate
• B. VF/VT → defibrillate → continue CPR for 2 min → vascular access → EPINEPHRINE 1:10,000 1 mg IV/IO → extraglottic airway/ETT → rhythm/pulse check → defibrillate → continue CPR for 2 min → AMIODARONE 300 mg IV/IO; may repeat 150 mg if refractory after 5th shock; Address H's & T's; Termination of Resuscitation Protocol
• C. Defibrillate after 3 cycles of CPR
• D. Give amiodarone before any defibrillation

Answer: (B)

In a shockable rhythm during cardiac arrest, the priority is immediate defibrillation to restore a perfusing rhythm, then structured cycles of CPR and meds to support continued perfusion and treat recurrent VF/VT. Start with a shock as soon as the rhythm is identified, because a prompt defibrillation gives the best chance for return of spontaneous circulation. After that first shock, resume high‑quality CPR right away for 2 minutes to maintain blood flow to the heart and brain. Then move through the next steps in a coordinated cycle: establish IV/IO access, give epinephrine 1 mg IV/IO every 3–5 minutes, secure the airway (extraglottic device or endotracheal tube) as needed, and perform a rhythm/pulse check. If the rhythm remains shockable, deliver another defibrillation, then continue CPR for another 2 minutes. If VF/VT persists after shocks, administer amiodarone 300 mg IV/IO (repeat 150 mg after the fifth shock if still refractory). Throughout, address reversible causes (the Hs and Ts) and follow the termination-of-resuscitation protocol as appropriate. This sequence best reflects current practice: defibrillate promptly, then repeat CPR cycles with timely meds and airway management, rather than delaying shocks or giving antiarrhythmics before attempting defibrillation.

In a shockable rhythm during cardiac arrest, the priority is immediate defibrillation to restore a perfusing rhythm, then structured cycles of CPR and meds to support continued perfusion and treat recurrent VF/VT. Start with a shock as soon as the rhythm is identified, because a prompt defibrillation gives the best chance for return of spontaneous circulation.

After that first shock, resume high‑quality CPR right away for 2 minutes to maintain blood flow to the heart and brain. Then move through the next steps in a coordinated cycle: establish IV/IO access, give epinephrine 1 mg IV/IO every 3–5 minutes, secure the airway (extraglottic device or endotracheal tube) as needed, and perform a rhythm/pulse check. If the rhythm remains shockable, deliver another defibrillation, then continue CPR for another 2 minutes. If VF/VT persists after shocks, administer amiodarone 300 mg IV/IO (repeat 150 mg after the fifth shock if still refractory). Throughout, address reversible causes (the Hs and Ts) and follow the termination-of-resuscitation protocol as appropriate.

This sequence best reflects current practice: defibrillate promptly, then repeat CPR cycles with timely meds and airway management, rather than delaying shocks or giving antiarrhythmics before attempting defibrillation.