What is the recommended ACLS approach for a pulseless ventricular tachycardia arrest?

• A. Immediate CPR, defibrillation, resume CPR, give epinephrine, and consider antiarrhythmic (amiodarone or lidocaine) after rhythm stabilization.
• B. Defibrillate immediately and stop; no CPR.
• C. Give epinephrine first, then do CPR, then defibrillate.
• D. Start with antiarrhythmic without CPR.

Answer: (A)

When a ventricular tachycardia arrest is pulseless, the goal is to restore perfusion quickly with a defibrillating shock, while keeping the heart and brain perfused through continuous CPR. The most effective sequence is to start high-quality CPR immediately, deliver a defibrillating shock as soon as possible, then continue CPR, give epinephrine every 3–5 minutes to improve coronary and cerebral perfusion, and consider an antiarrhythmic (like amiodarone or lidocaine) after initial attempts and once the rhythm is stabilized or after recurrent shocks.

This approach prioritizes rapid defibrillation because VT/VF are shockable rhythms, but it also recognizes that uninterrupted perfusion is crucial. Epinephrine helps with perfusion during arrest, and antiarrhythmics are valuable if the rhythm remains unstable or recurs after shocks.

Why the other sequences aren’t as effective: delaying defibrillation or replacing it with medications first reduces the chance to terminate the dysrhythmia quickly. Stopping CPR to give a drug, or giving antiarrhythmics before attempting defibrillation, misses the immediate benefit of shocking a potentially reversible rhythm and maintaining perfusion through chest compressions.