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Documented exercise-induced cardiac arrest in a paediatric patient with hypertrophic cardiomyopathy

Alonso Pedrote1, Francisco J Morales, Lorena García-Riesco

  • 1Arrhythmias Unit, Cardiology Service, Virgen del Rocío University Hospital, Manuel Siurot s/n, 41013, Sevilla, Spain. pedroteal@vodafone.es

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
|May 12, 2006
PubMed

Insights

A pediatric patient with hypertrophic cardiomyopathy (HCM) experienced cardiac arrest from ventricular fibrillation. An implantable cardioverter-defibrillator (ICD) successfully treated a recurrence, supporting its use in high-risk children.

Area of Science:

  • Cardiology
  • Pediatric Electrophysiology

Background:

  • Hypertrophic cardiomyopathy (HCM) is a genetic heart condition that can lead to life-threatening arrhythmias.
  • Sudden cardiac arrest (SCA) is a significant risk in pediatric patients with HCM.

Observation:

  • A pediatric patient with HCM presented with cardiac arrest due to ventricular fibrillation.
  • Despite negative electrophysiological study results, an implantable cardioverter-defibrillator (ICD) was implanted.
  • The patient experienced recurrent cardiac arrest during exercise nine months post-implantation, successfully treated by the ICD.

Findings:

  • Electrogram analysis revealed ventricular fibrillation with abrupt onset following sinus tachycardia.
  • The case highlights the potential for recurrent life-threatening ventricular arrhythmias in pediatric HCM.
  • The ICD delivered a life-saving shock, confirming its efficacy in this scenario.

Implications:

  • This case supports the use of ICDs as a crucial, life-saving intervention for pediatric patients with HCM at high risk for sudden cardiac death.
  • It underscores the importance of considering ICD implantation even when electrophysiological studies are non-diagnostic.
  • Further research into risk stratification and management strategies for pediatric HCM is warranted.

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