Radiofrequency ablation of a posteroseptal accessory pathway via the middle cardiac vein in a six-year-old child

Area of Science:

• Cardiology
• Pediatric Electrophysiology

Background:

• Radiofrequency ablation is a primary treatment for Wolff-Parkinson-White syndrome.
• Subepicardial accessory pathways can be challenging to ablate via endocardial approaches.
• Previous studies demonstrated success in adults using coronary sinus energy delivery for left-sided pathways.

Observation:

• A 6-year-old boy with a posteroseptal pathway refractory to standard ablation was treated.
• Energy delivery was performed within the middle cardiac vein, a branch of the coronary sinus.
• The procedure aimed to document safety and efficacy in a pediatric population.

Findings:

• Successful radiofrequency ablation of the posteroseptal pathway was achieved.
• The child experienced no recurrence of the arrhythmia.
• No significant coronary vascular injury was observed post-procedure.

Implications:

• This case suggests that transvenous radiofrequency ablation within the coronary sinus is a viable option for pediatric patients with difficult-to-ablate accessory pathways.
• It expands treatment possibilities for challenging cases of Wolff-Parkinson-White syndrome in children.
• Further research is warranted to confirm long-term outcomes and safety in a larger pediatric cohort.