Resynchronization or dyssynchronization--successful treatment with biventricular stimulation of a child with...

Area of Science:

• Cardiology
• Pediatric Electrophysiology
• Cardiovascular Medicine

Background:

• Hypertrophic cardiomyopathy (HCM) in children can lead to significant intraventricular pressure gradients.
• Implantable cardioverter-defibrillators (ICDs) are indicated for prophylactic use in select pediatric HCM cases.
• Biventricular pacing strategies are explored for managing complex cardiac conditions.

Observation:

• A 10-year-old boy with HCM presented with a high intraventricular pressure gradient (104 mmHg).
• Intraoperative pressure measurements guided the decision for biventricular ICD implantation.
• The patient was monitored for 2.5 months post-implantation.

Findings:

• The biventricular ICD implantation resulted in significant clinical improvement, with enhanced functional status.
• Objective and subjective parameters indicated a marked reduction in the intraventricular pressure gradient, decreasing to 12 mmHg.
• Concurrently, significant electrical and mechanical cardiac dyssynchrony emerged during the observation period.

Implications:

• Biventricular ICDs may be effective in managing pediatric HCM with high pressure gradients.
• The development of cardiac dyssynchrony alongside clinical improvement warrants further investigation.
• This case highlights the complex interplay between interventions, clinical outcomes, and electrophysiological changes in pediatric HCM.