Table of Contents
ISRN Cardiology
Volume 2011, Article ID 475796, 3 pages
Case Report

Isolated Atrial Lead Conduction Delay following Right Atrial Radiofrequency Maze Procedure

1Division of Cardiovascular Diseases, Department of Internal Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
2Division of Cardiovascular Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA

Received 27 February 2011; Accepted 11 April 2011

Academic Editors: A. V. Bruschke and Y. Hayabuchi

Copyright © 2011 Mackram F. Eleid et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A 60-year-old man with a dual-chamber implantable cardioverter defibrillator and severe dyspnea on exertion due to apical hypertrophic cardiomyopathy underwent a septal myectomy and radiofrequency maze procedure. Following the procedure a persistent delay in atrial sensing was observed and was most likely a result of iatrogenic conduction delay from right atrial ablation lines. These observations suggest that atrial conduction properties can be altered during the surgical maze procedure and should be considered in the differential diagnosis of sensing or pacing malfunction.