Amiodarone is considered a class III antiarrhythmic agent and is used for various types tachyarrhythmias. Because of its associated toxicity and serious side-effects it should be used cautiously and care should be taken to ensure that cumulative doses are not exceeded.
Indications for ACLS
Amiodarone is an antiarrhythmic that is used to treat both supraventricular arrhythmias and ventricular arrhythmias.
The mechanism of action of amiodarone remains unknown, but within the framework of ACLS, amiodarone is used primarily to treat ventricular fibrillation and ventricular tachycardia that occurs during cardiac arrest and is unresponsive to shock delivery, CPR, and vasopressors.
Amiodarone should not be used in individuals with polymorphic VT as it associated with a prolonged QT interval which is made worse with antiarrhythmic drugs.
Amiodarone should only be used after defibrillation/cardioversion and epinephrine (first line medication(s) have failed to convert VT/VF.
Amiodarone can be administered by intravenous or intraosseous route.
The maximum cumulative dose in a 24 hour period should not exceed 2.2 grams.
Within the VT/VF pulseless arrest algorithm, the dosing is as follows:
300mg IV/IO push → (if no conversion) 150 mg IV/IO push → (after conversion) Infusion #1 360 mg IV over 6 hours (1mg/min) → Infusion #2 540 mg IV over 18 hours (0.5mg/min)
For tachyarrhythmias other than life threatening, expert consultation should be considered before use.
For Tachycardia other than pulseless VT/VF, Amiodarone dosing is as follows: (see above note)
150 mg over 10 minutes → repeat as needed if VT recurs → maintenance infusion of 1mg/min for 6 hours
Amiodarone should only be diluted with D5W and given with an in-line filter.
Infusions exceeding 2 hours must be administered in glass or polyolefin bottles containing D5W.