Non-Invasive Estimates of Left Atrial Activation in a Patient with Dissociated Left Atrial Tachycardia following Ablation of Atrial Fibrillation
Author
Summary, in English
Introduction: Interatrial frequency gradient is used to guide catheter ablation of atrial fibrillation (AF) but reliable tools for its non-invasive estimation are lacking. We present a patient with dissociated left and right atrial rhythms that allows identification of sum face ECG leads that closely reflect left atrial activity. Methods: 12-lead ECG was recorded simultaneously with electrograms from the right and left atrial appendages (RAA/LAA). AF frequency spectra have been calculated from all 12 leads using spatiotemporal QRST cancellation and Welch periodogram. The dominating atrial cycle length (ACL) in the surface ECG leads was subsequently compared with ACL(LAA). Results: RAA and LAA cycle lengths were 1276 ins and 252 ins respectively. Of all surface ECG leads, AF frequency spectra in leads VI and aVR demonstrated the best agreement with ACL(LAA) showing prominent peaks corresponding to the LAA activation frequency. Conclusion: Leads VI and aVR contain a prominent left atrial component that has to be considered when interpreting fibrillatry activity from sum face ECG.
Publishing year
2009
Language
English
Pages
133-136
Publication/Series
CINC: 2009 36TH Annual Computers In Cardiology Conference
Links
Document type
Conference paper
Publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
Topic
- Cardiac and Cardiovascular Systems
Conference name
36th Annual Computers in Cardiology Conference, 2009
Conference date
2009-09-13 - 2009-09-16
Conference place
Park City, UT, United States
Status
Published
Research group
- Signal Processing
ISBN/ISSN/Other
- ISSN: 0276-6574
- ISBN: 978-1-4244-7281-9