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Case Reports
. 2021 Aug;32(8):2343-2345.
doi: 10.1111/jce.15138. Epub 2021 Jul 16.

Complete interatrial block in a left-atrial dependent atrioventricular node

Javier Ramos Jiménez  1 , Álvaro Marco Del Castillo  1 , Daniel Rodríguez Muñoz  1 , Luis Borrego Bernabé  1 , Adolfo Fontenla  1 , María López Gil  1
Affiliations
Case Reports

Complete interatrial block in a left-atrial dependent atrioventricular node

Javier Ramos Jiménez et al. J Cardiovasc Electrophysiol. 2021 Aug.

Abstract

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.

Keywords: Bachmann's bundle; atrial dissociation; atrial flutter; complete heart block; interatrial block.

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References

REFERENCES

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    1. Inoue S, Becker AE. Posterior extensions of the human compact atrioventricular node. Circulation. 1998;97(2):188-193.
    1. Enriquez A, Santangeli P, Zado ES, et al. Postoperative atrial tachycardias after mitral valve surgery: Mechanisms and outcomes of catheter ablation. Heart Rhythm. 2017;14(4):520-526.

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