Key result
Vagally mediated complete AV block triggers atrial fibrillation within 33 seconds in a rare presentation.
Why the study?
Documentation of vagally mediated atrioventricular block and atrial fibrillation occurring in the same patient is exceedingly rare.
Case Report (n=1)
This case report documents the exceedingly rare occurrence of vagally mediated atrial fibrillation developing shortly after complete atrioventricular block in the same patient.
May inform recognition of delayed AF after vagal AV block; hypothesis-generating and leaves mechanism open.
Increased vagal tone is a well-recognized cause of atrioventricular block (AVB) and atrial fibrillation (AF).1˒2 However, documentation of vagally mediated AVB and AF occurring in the same patient is exceedingly rare. To the best of our knowledge, only a single case has been reported to date, by Kowlgi et al.3 In that patient, vagally mediated AF was reproducibly induced immediately following a brief episode of AVB.3 We herein report unusual findings in a patient who developed AF 33 seconds after the onset of vagally mediated complete AVB (CAVB).
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Vander et al. (2026) conducted a case report in Vagally mediated atrioventricular block and atrial fibrillation (n=1). Vagally mediated complete atrioventricular block was evaluated on Development of atrial fibrillation. A patient developed atrial fibrillation 33 seconds after the onset of vagally mediated complete atrioventricular block, an exceedingly rare presentation.
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