Outcomes of Infant Supraventricular Tachycardia Management Without Medication

Area of Science:

• Pediatric Cardiology
• Electrophysiology
• Neonatal Medicine

Background:

• Supraventricular tachycardia (SVT) in infants often prompts antiarrhythmic treatment to prevent tachycardia-induced cardiomyopathy.
• A common alternative practice involves parental education on monitoring and seeking care, rather than immediate pharmacologic intervention.
• Evaluating the outcomes of this non-pharmacologic approach is crucial for optimizing infant SVT management.

Purpose of the Study:

• To compare the outcomes of non-pharmacologic management versus antiarrhythmic treatment for infants experiencing their first episode of SVT.
• To assess recurrence rates, hospital length of stay, emergency department visits, and the development of tachycardia-induced cardiomyopathy.

Main Methods:

• Retrospective single-center study of infants with a first SVT episode (2014-2021).
• Exclusion criteria included non-reentry tachyarrhythmias, specific cardiac conditions, and abnormal ventricular function.
• Comparison of outcomes between infants managed with and without antiarrhythmics.

Main Results:

• SVT recurrence was observed in 28% of the non-treatment group versus 50% in the antiarrhythmic group (p=0.12).
• The non-treatment group had a significantly shorter hospital length of stay (1 day vs. 3 days, p<0.01).
• Non-treated infants were less likely to present to the emergency department for recurrent SVT (6% vs. 32%, p<0.01); no cardiomyopathy developed in either group.

Conclusions:

• Non-pharmacologic management with parental education is a safe and effective strategy for infants with structurally and functionally normal hearts after their first SVT episode.
• This approach avoids medication burdens and reduces healthcare utilization without compromising patient safety.
• Parental empowerment and comfort in managing clinically insignificant tachycardia at home are significant benefits.