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Related Experiment Videos

[Congenital atrioventricular block].

R Grolleau1, F Leclercq, S Guillaumont

  • 1Service de cardiologie A, Hôpital Arnaud-de-Villeneuve, Montpellier.

Archives Des Maladies Du Coeur Et Des Vaisseaux
|May 18, 1999
PubMed
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Congenital atrioventricular block is a rare heart condition diagnosed in newborns. Advances in cardiac pacing offer satisfactory treatment for this condition, improving patient outcomes.

Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Electrophysiology

Background:

  • Congenital atrioventricular block (AVB) is a rare condition affecting 1 in 20,000 births.
  • It can be isolated or associated with other congenital heart malformations.
  • Maternal autoimmune diseases (e.g., Sjogren's syndrome) are linked to isolated congenital AVB via transplacental antibody transfer.

Observation:

  • Diagnosis can occur prenatally via echocardiography or postnatally via electrocardiography.
  • Congenital AVB may be incomplete or permanent, with the degree of block often progressing over time.
  • Fetal AVB with an escape rhythm > 60/min generally has a good prognosis, while a heart rate < 55/min and anasarca indicate a poor prognosis.

Findings:

  • Long-term follow-up reveals a less favorable prognosis than previously thought for isolated congenital AVB.

Related Experiment Videos

  • Cardiac pacing provides effective treatment, with specialized techniques for pediatric patients.
  • Endocavitary pacing via thin catheters is preferred in children over epicardial approaches.

    • Implications:

    • Despite historical concerns, advances in cardiac pacing significantly improve the management and outcomes of congenital AVB.
    • Regular follow-up using Holter monitoring, exercise testing, and echocardiography is crucial for pediatric patients.
    • Pacing is indicated for symptomatic patients and those with specific ECG findings like long QT intervals or frequent ventricular extrasystoles.