Final answer:
Lidocaine is administered at an initial dose of 1 to 1.5 mg/kg intravenously for refractory V-Fib or Pulseless V-Tach, with possible additional doses and a maximum cumulative dose of 3 mg/kg as part of ACLS protocol.
Step-by-step explanation:
The dose of lidocaine for the treatment of refractory ventricular fibrillation (V-Fib) or pulseless ventricular tachycardia (Pulseless V-Tach) is typically an initial dose of 1 to 1.5 mg/kg intravenously. If needed, additional doses of 0.5 to 0.75 mg/kg may be given at 5 to 10 minute intervals, with a maximum cumulative dose of 3 mg/kg. It's essential to note that lidocaine used in this context is part of advanced cardiac life support (ACLS) protocol and should only be administered by qualified healthcare professionals.