For a stable pediatric patient with wide complex tachycardia that is regular monomorphic VT, what is the initial treatment and dose?

For a stable pediatric patient with wide complex tachycardia that is regular monomorphic VT, what is the initial treatment and dose?

• A. Amiodarone 5 mg/kg in 50 mL NS over 20 min; if unsuccessful, synchronized cardioversion 1 J/kg (may escalate to 2 J/kg) with sedation
• B. Adenosine 0.1 mg/kg; if unsuccessful 0.2 mg/kg
• C. Magnesium sulfate 25 mg/kg IV/IO over 10 min
• D. Vagal maneuvers and observation

Answer: (A)

When a child is stable but has wide-complex tachycardia that is regular and monomorphic, the first-line treatment is an IV antiarrhythmic: amiodarone. This drug is effective for pediatric VT and can be given safely as a slow infusion. The recommended initial dose is 5 mg/kg delivered over about 20 minutes in 50 mL of normal saline. If the tachycardia persists after the infusion, or the child remains hemodynamically stable but symptoms continue, you should proceed with synchronized cardioversion, starting at 1 J/kg and increasing to 2 J/kg if needed, with sedation for the child during the procedure. Adenosine is used for certain narrow-complex tachycardias and AV nodal–dependent rhythms, not regular wide-complex VT, so it is not appropriate here. Magnesium sulfate is primarily for torsades de pointes or hypomagnesemic VT, not standard monomorphic VT. Vagal maneuvers and observation won’t terminate VT and are not appropriate as the initial treatment in this scenario.

When a child is stable but has wide-complex tachycardia that is regular and monomorphic, the first-line treatment is an IV antiarrhythmic: amiodarone. This drug is effective for pediatric VT and can be given safely as a slow infusion. The recommended initial dose is 5 mg/kg delivered over about 20 minutes in 50 mL of normal saline. If the tachycardia persists after the infusion, or the child remains hemodynamically stable but symptoms continue, you should proceed with synchronized cardioversion, starting at 1 J/kg and increasing to 2 J/kg if needed, with sedation for the child during the procedure.

Adenosine is used for certain narrow-complex tachycardias and AV nodal–dependent rhythms, not regular wide-complex VT, so it is not appropriate here. Magnesium sulfate is primarily for torsades de pointes or hypomagnesemic VT, not standard monomorphic VT. Vagal maneuvers and observation won’t terminate VT and are not appropriate as the initial treatment in this scenario.