A patient is in refractory ventricular fibrillation. High-quality CPR is in progress, and shocks have been given. One dose of epinephrine was given after the second shock. An antiarrhythmic drug was given immediately after the third shock. What drug should the team leader request to be prepared for administration next?
a) Amiodarone
b) Lidocaine
c) Procainamide
d) Flecainide