What is the initial dose of adenosine for treating SVT in children?

Adenosine is commonly used in the emergency treatment of supraventricular tachycardia (SVT) in children. The initial dose recommended for adenosine administration is 0.1 mg/kg, which is typically administered as a rapid intravenous push followed by a saline flush. This dose is effective for quickly halting the racing heart rhythm associated with SVT, and if necessary, it can be followed by a second dose of 0.2 mg/kg if the initial dose is ineffective.

The rationale behind starting at this particular dose is based on the pharmacological properties of adenosine, which can cause a transient AV node block, effectively resetting the heart’s electrical conduction system back to normal rhythm in appropriate situations. Using the correct dosing is crucial for balancing efficacy with safety, as higher doses may lead to significant adverse effects without improving efficacy.

The other options represent doses that are either too low or too high compared to the established guidelines for pediatric dosing of adenosine in the treatment of SVT. Proper adherence to dosing recommendations is critical in ensuring effective treatment while minimizing potential complications.