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Updated: Jun 30, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
2: 1 AV block post ASD device closure - What is the mechanism
Sanjeev S Mukherjee1, Ashesh Halder2, Anil Kumar Singhi2
1AIIMS Kalyani, West Bengal, India.
None:
We report a case of atrioventricular (AV) block post successful percutaneous atrial septal defect (ASD) device closure. He had minimal fatigue and presented for his routine follow-up after intervention. His ECG showed 2:1 AV block. The interesting finding was appearance of varying PR interval in the conducted beats evoking possibility of complete heart block (CHB). We review the literature and conclude that changing PR is part of compensation to maintain R-R interval in a typical Wenckebach phenomenon.
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