A client has been defibrillated at 360 joules (monophasic) and the attempts to convert the ventricular fibrillation (VF) were unsuccessful. Based on an evaluation of the situation, the nurse determines that which action is best?

Defibrillation is an asynchronous countershock used to terminate pulseless ventricular tachycardia (VT) or ventricular fibrillation (VF). The defibrillator is charged to 120 to 200 joules (biphasic) or 300 joules (monophasic) for 1 countershock from the defibrillator, and then CPR is immediately resumed and continued for 5 cycles or about 2 minutes. The rhythm is reassessed after 2 minutes and if VF or pulseless VT continues, the defibrillator is charged to give a second shock at the same energy level previously used. CPR is resumed after the shock if needed and the life support protocol is continued. There is no information in the question to indicate that life support should be terminated. Sodium bicarbonate may be prescribed but is not the best action. Giving CPR for 5 minutes may not help oxygenation to the brain and myocardium and is not the best action.