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Published on: April 29, 2013
Supraventricular arrhythmias in children
Insights
Sudden death in children can be caused by supraventricular arrhythmias like sick sinus syndrome and Wolff-Parkinson-White syndrome. Pacemakers and surgical interventions can prevent sudden cardiac death in at-risk pediatric patients.
Area of Science:
- Pediatric Cardiology
- Electrophysiology
- Cardiac Arrhythmias
Background:
- Supraventricular arrhythmias pose a risk of sudden death in children.
- Specific conditions like sick sinus syndrome and Wolff-Parkinson-White syndrome are associated with increased risk.
- Previous open-heart surgery can be a contributing factor.
Purpose of the Study:
- To identify risk factors for sudden death in pediatric supraventricular arrhythmias.
- To outline preventive strategies for sudden cardiac death in children.
- To discuss the role of electrophysiology testing and interventions.
Main Methods:
- Review of clinical data on pediatric patients with supraventricular arrhythmias.
- Analysis of risk factors associated with sudden death.
- Evaluation of treatment outcomes for various interventions.
Main Results:
- Supraventricular tachycardia rarely causes death, except in junctional automatic tachycardia or Wolff-Parkinson-White syndrome.
- A short anterograde refractory period indicates risk.
- Surgical division of accessory pathways and pacemaker therapy are effective preventive measures.
Conclusions:
- Sudden death in children with supraventricular arrhythmias is preventable.
- Pacemakers are crucial for complete AV block and bradycardia.
- Careful electrophysiology evaluation is necessary before administering certain medications like digitalis.
Abstract:
Sudden death may occur in children with supraventricular arrhythmias. Sick sinus syndrome, particularly if associated with tachycardia, may result in sudden death in children who have had open heart surgery and rarely in children with a normal heart. Children with supraventricular tachycardia rarely die. Only those with junctional automatic tachycardia or Wolff-Parkinson-White syndrome have died. Patients with a short anterograde refractory period may be at risk of sudden death. Surgical division of the accessory connection can prevent sudden death. Digitalis may accelerate atrioventricular (AV) conduction in patients with Wolff-Parkinson-White syndrome and, thus, should be used only after testing in the electrophysiology laboratory. Sudden death due to complete AV block should be preventable using pacemakers. Neonates with a ventricular rate less than 55 beats/min or children with a rate less than 45 beats/min should receive pacemaker therapy because of the statistical probability of death or syncope. Ventricular ectopic beats, particularly if frequent or multiform, may be an indication for pacemaker insertion. Patients with surgical complete AV block that persists for more than 7 to 10 days should receive physiologic pacemakers for the prevention of sudden death and hemodynamic benefit.
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