Atrioventricular block masked by posteroseptal bypass tract located in coronary sinus aneurysm

Michael C Y Nam; Matthew Wilkins; Alana Harris; Naresh Dayananda

doi:10.1016/j.jelectrocard.2017.07.002

Atrioventricular block masked by posteroseptal bypass tract located in coronary sinus aneurysm

J Electrocardiol. 2017 Nov-Dec;50(6):978-980. doi: 10.1016/j.jelectrocard.2017.07.002. Epub 2017 Jul 12.

Authors

Michael C Y Nam¹, Matthew Wilkins², Alana Harris², Naresh Dayananda²

Affiliations

¹ Department of Cardiac Electrophysiology, Sunshine Coast University Hospital, 6 Doherty Street, Birtinya, Queensland 4575, Australia. Electronic address: michael.nam@health.qld.gov.au.
² Department of Cardiac Electrophysiology, Sunshine Coast University Hospital, 6 Doherty Street, Birtinya, Queensland 4575, Australia.

PMID: 28821328
DOI: 10.1016/j.jelectrocard.2017.07.002

Abstract

Atrial fibrillation with concurrent ventricular preexcitation identifies a high-risk arrhythmic substrate and usually results in catheter ablation of the atrioventricular bypass tract. Electrocardiography can only approximate the anatomical location of an accessory pathway. Here we report a case where a bypass tract was localised to a coronary sinus aneurysm and antegrade atrioventricular conduction masked underlying atrioventricular nodal block.

Keywords: Arrhythmias; Atrial fibrillation; Catheter ablation and implantable cardioverter-defibrillator; Electrophysiology; Sudden cardiac death.

Publication types

Case Reports

MeSH terms

Aged
Atrial Fibrillation / diagnosis*
Atrial Fibrillation / physiopathology
Atrial Fibrillation / therapy*
Atrioventricular Block / diagnosis*
Atrioventricular Block / physiopathology
Atrioventricular Block / therapy*
Catheter Ablation
Coronary Sinus / physiopathology*
Diagnosis, Differential
Diagnostic Imaging
Electrocardiography*
Female
Heart Aneurysm / diagnosis*
Heart Aneurysm / physiopathology
Heart Aneurysm / therapy*
Humans