The initial dose and maximums for adenosine when treating pediatric SVT?

The initial dose and maximums for adenosine when treating pediatric SVT?

• A. First dose 0.1 mg/kg IV (max 6 mg); second dose 0.2 mg/kg IV (max 12 mg)
• B. First dose 0.5 mg/kg; second dose 1 mg/kg
• C. First dose 0.05 mg/kg; second dose 0.1 mg/kg
• D. First dose 0.2 mg/kg; second dose 0.4 mg/kg

Answer: (A)

In pediatric SVT, adenosine dosing is two rapid IV boluses given in a weight-based, capped manner. Start with 0.1 mg/kg IV push, with a maximum single dose of 6 mg. If the rhythm doesn’t terminate, give a second dose of 0.2 mg/kg IV push, with a maximum of 12 mg. The rapid IV push is essential because adenosine has an extremely short half-life, so it must reach the heart quickly to transiently block AV nodal conduction and interrupt the reentrant circuit, often restoring a normal rhythm. Other dosing schemes either aren’t weight-based or don’t use the recommended maximums, which can lead to underdosing in bigger children or unsafe dosing in smaller ones, and they don’t align with standard pediatric PALS practice.

In pediatric SVT, adenosine dosing is two rapid IV boluses given in a weight-based, capped manner. Start with 0.1 mg/kg IV push, with a maximum single dose of 6 mg. If the rhythm doesn’t terminate, give a second dose of 0.2 mg/kg IV push, with a maximum of 12 mg. The rapid IV push is essential because adenosine has an extremely short half-life, so it must reach the heart quickly to transiently block AV nodal conduction and interrupt the reentrant circuit, often restoring a normal rhythm.

Other dosing schemes either aren’t weight-based or don’t use the recommended maximums, which can lead to underdosing in bigger children or unsafe dosing in smaller ones, and they don’t align with standard pediatric PALS practice.