Biphasic DC shock cardioverting doses for paediatric atrial dysrhythmias

Area of Science:

• Pediatric Cardiology
• Electrophysiology
• Critical Care Medicine

Background:

• Atrial dysrhythmias are common in pediatric patients and can lead to significant morbidity.
• Cardioversion using direct current (DC) shock is a primary treatment modality for these arrhythmias.
• Determining optimal energy doses for biphasic DC shock in children is crucial for effective and safe treatment.

Purpose of the Study:

• To establish effective cardioversion doses of biphasic DC shock for pediatric atrial dysrhythmias.
• To compare the efficacy of different energy levels for external and internal cardioversion.
• To provide evidence-based recommendations for shock energy selection in pediatric atrial dysrhythmias.

Main Methods:

• Prospective study involving children with shockable atrial dysrhythmias.
• Recording of energy delivered, and pre- and post-shock rhythms.
• Analysis of cardioversion success rates based on energy doses (J/kg) for external and internal shocks.

Main Results:

• Forty episodes of atrial dysrhythmias in 25 children were treated with external shocks.
• Cardioversion success rates varied with energy doses: 25% at <0.5 J/kg, 88% at 0.5-1.0 J/kg, and 56% at >1.0 J/kg (p=0.01).
• Internal cardioversion in 11 children (18 episodes) successfully converted all dysrhythmias at an average dose of 0.4 J/kg.

Conclusions:

• Recommended initial external cardioversion doses for pediatric atrial dysrhythmias are 0.5-1.0 J/kg.
• Higher doses up to 2 J/kg may be needed for subsequent external shocks.
• Internal cardioversion doses of 0.5 J/kg are effective.