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Late-Onset Third Degree Atrioventricular Block in Adult With Surgically Corrected Ebstein Anomaly: A Case Report

Bishal Kumar Yadav1, Bishal Sigdel1, Bishal Mandal1

  • 1Maharajgunj Medical Campus Tribhuvan University, Institute of Medicine Maharajgunj Nepal.

Clinical Case Reports
|May 18, 2026
PubMed

Insights

Late-onset third-degree atrioventricular (AV) block, a rare complication after Ebstein anomaly surgery, requires vigilant cardiac monitoring. Prompt intervention with a permanent pacemaker is crucial for effective management of this life-threatening condition.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Electrophysiology

Background:

  • Late-onset third-degree atrioventricular (AV) block is a rare but serious complication following surgical correction of Ebstein anomaly.
  • This condition can manifest years after the initial surgery, posing a significant risk to patients.

Purpose of the Study:

  • To highlight the critical nature of late-onset third-degree AV block after Ebstein anomaly repair.
  • To emphasize the importance of continuous cardiac monitoring and prompt pacemaker implantation for managing this complication.

Main Methods:

  • Review of clinical cases and literature regarding late-onset AV block post-Ebstein anomaly surgery.
  • Analysis of management strategies, focusing on monitoring and intervention.

Main Results:

  • Late-onset third-degree AV block is a recognized, albeit infrequent, complication.
  • Effective management hinges on early detection through regular cardiac monitoring.
  • Epicardial permanent pacemaker implantation is a key intervention.

Conclusions:

  • Vigilant, long-term cardiac surveillance is essential for patients who underwent Ebstein anomaly repair.
  • Timely intervention with an epicardial permanent pacemaker is vital for managing late-onset third-degree AV block and improving patient outcomes.

Keywords:
Ebstein anomalycardiac surgerycomplete heart blockcongenital heart diseaselate onset third‐degree atrioventricular blockpacemaker

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