Final answer:
The team leader should prepare a second dose of epinephrine for administration, following ACLS guidelines recommending administration every 3-5 minutes during cardiac arrest, and continue with high-quality CPR and repeated defibrillation attempts.
Step-by-step explanation:
The team leader should prepare a second dose of epinephrine to be administered next following Advanced Cardiac Life Support (ACLS) guidelines, which recommend administering epinephrine every 3-5 minutes during cardiac arrest. If a first dose of antiarrhythmic drug was given after the third shock, options could include another dose of the same antiarrhythmic given, or alternative drugs such as amiodarone or lidocaine depending on what was given initially. High-quality CPR should be continued with minimal interruptions, and defibrillation attempts should be repeated as necessary.
Amiodarone is an antiarrhythmic drug that is commonly used in the treatment of refractory ventricular fibrillation. It helps to stabilize the electrical activity of the heart and restore a normal rhythm. In this case, it should be administered immediately after the third shock to further attempt to terminate the arrhythmia and improve the patient's condition.