This patient has been resuscitated from cardiac arrest. During the resuscitation amiodarone 300 mg was administered. Now the patient develops severe chest discomfort, is diaphoretic, and has the above rhythm. BP is 80/60 mm Hg. What is the next indicated action:
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repeat amiodarone 300 mg IV.
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Repeat amiodarone 150 mg IV
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Perform synchronized cardioversion
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Give lidocaine 1-1.5 mg/kg IV
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Give immediate unsynchronized defibrillation
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