When is amiodarone indicated in the cardiac arrest algorithm for shockable rhythms?

When is amiodarone indicated in the cardiac arrest algorithm for shockable rhythms?

• A. Before the first shock
• B. After the 5th shock if refractory
• C. Only if bradycardia
• D. Never administer amiodarone

Answer: (B)

Amiodarone is used in a shockable cardiac arrest when defibrillation alone hasn’t worked and the rhythm remains VF or pulseless VT. In this protocol, that situation is defined as after multiple unsuccessful shocks—specifically after the fifth shock if the rhythm is still refractory. The idea is to add an antiarrhythmic to suppress recurrent arrhythmias and improve the chance of rhythm conversion with subsequent shocks. It’s not given before the first defibrillation attempt, and it’s not used for bradycardia alone. If used, it works by prolonging the myocardial refractory period and reducing ectopic activity, helping to stabilize the rhythm for defibrillation to be effective.

Amiodarone is used in a shockable cardiac arrest when defibrillation alone hasn’t worked and the rhythm remains VF or pulseless VT. In this protocol, that situation is defined as after multiple unsuccessful shocks—specifically after the fifth shock if the rhythm is still refractory. The idea is to add an antiarrhythmic to suppress recurrent arrhythmias and improve the chance of rhythm conversion with subsequent shocks. It’s not given before the first defibrillation attempt, and it’s not used for bradycardia alone. If used, it works by prolonging the myocardial refractory period and reducing ectopic activity, helping to stabilize the rhythm for defibrillation to be effective.