Journal
JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY
Volume 32, Issue 8, Pages 2343-2345Publisher
WILEY
DOI: 10.1111/jce.15138
Keywords
atrial dissociation; atrial flutter; Bachmann's bundle; complete heart block; interatrial block
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During surgery, interatrial dissociation and complete block of the sinus impulse to the AV node were observed.
Activation of the AV node became dependent on a subsidiary left atrial rhythm.
Anatomical location of intra and inter-atrial connections must be considered when performing extensive ablation procedures.
Introduction: A middle-age woman underwent an electrophysiologic study due to recurrent atypical atrial flutter. Methods and Result: Radiofrequency ablation of cavotricuspid isthmus and anterior mitral line was performed. During energy delivery on the anterior left atrial wall, interatrial dissociation and complete block of the sinus impulse to the atrioventricular (AV) node was observed. AV node activation became dependent on a subsidiary left atrial rhythm. Conclusion: Anatomical location of intra and inter-atrial connections must be taken into account when performing extensive ablation procedures, specially in cases with prior cardiac surgeries.
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