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Amplatzer septal occluder-induced transient complete atrioventricular block
Shan-Miao Lin1, Haw-Kwei Hwang, Ming-Ren Chen
1Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan.
Journal of the Formosan Medical Association = Taiwan Yi Zhi
|January 16, 2008
Summary
Percutaneous closure of atrial septal defects (ASDs) using the Amplatzer septal occluder can rarely cause atrioventricular block. This condition typically resolves over several weeks with treatment, indicating a good prognosis for affected patients.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Interventional Cardiology
Background:
- Percutaneous transcatheter atrial septal defect (ASD) closure is a common alternative to open-heart surgery.
- The Amplatzer septal occluder is a frequently used device for ASD closure, known for its safety and efficacy.
- Despite its widespread use, complications associated with Amplatzer septal occluder implantation have been reported.
Observation:
- A 9-year-old boy developed complete atrioventricular block following percutaneous closure of a large secundum ASD.
- The patient received an Amplatzer septal occluder during the procedure.
- The atrioventricular block was treated with oral prednisolone.
Findings:
- The patient's atrioventricular conduction gradually improved following treatment.
- Conduction improved to second-degree Mobitz type 1 block by post-procedure day 24.
- First-degree atrioventricular block was noted by post-procedure day 35.
Implications:
- Complete atrioventricular block induced by Amplatzer septal occluder implantation can have a favorable outcome.
- Recovery of atrioventricular conduction may be a prolonged process, potentially taking several weeks.
- This case highlights the importance of monitoring for cardiac conduction abnormalities after percutaneous ASD closure.
