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Type: Journal article
Title: Aortic stiffness in lone atrial fibrillation: A novel risk factor for arrhythmia recurrence
Author: Lau, D.
Middeldorp, M.
Brooks, A.
Ganesan, A.
Roberts-Thomson, K.
Stiles, M.
Leong, D.
Abed, H.
Lim, H.
Wong, C.
Willoughby, S.
Young, G.
Kalman, J.
Abhayaratna, W.
Sanders, P.
Citation: PLoS One, 2013; 8(10):1-9
Publisher: Public Library of Science
Issue Date: 2013
ISSN: 1932-6203
Statement of
Dennis H. Lau, Melissa E. Middeldorp, Anthony G. Brooks, Anand N. Ganesan, Kurt C. Roberts-Thomson, Martin K. Stiles, Darryl P. Leong, Hany S. Abed, Han S. Lim, Christopher X. Wong, Scott R. Willoughby, Glenn D. Young, Jonathan M. Kalman, Walter P. Abhayaratna, Prashanthan Sanders
Abstract: BACKGROUND Recent community-based research has linked aortic stiffness to the development of atrial fibrillation. We posit that aortic stiffness contributes to adverse atrial remodeling leading to the persistence of atrial fibrillation following catheter ablation in lone atrial fibrillation patients, despite the absence of apparent structural heart disease. Here, we aim to evaluate aortic stiffness in lone atrial fibrillation patients and determine its association with arrhythmia re currence following radio-frequency catheter ablation. METHODS We studied 68 consecutive lone atrial fibrillation patients who underwent catheter ablation procedure for atrial fibrillation and 50 healthy age- and sex-matched community controls. We performed radial artery applanation tonometry to obtain central measures of aortic stiffness: pulse pressure, augmentation pressure and augmentation index. Following ablation, arrhythmia recurrence was monitored at months 3, 6, 9, 12 and 6 monthly thereafter. RESULTS Compared to healthy controls, lone atrial fibrillation patients had significantly elevated peripheral pulse pressure, central pulse pressure, augmentation pressure and larger left atrial dimensions (all P<0.05). During a mean follow-up of 2.9±1.4 years, 38 of the 68 lone atrial fibrillation patients had atrial fibrillation recurrence after initial catheter ablation procedure. Neither blood pressure nor aortic stiffness indices differed between patients with and without atrial fibrillation recurrence. However, patients with highest levels (≥75th percentile) of peripheral pulse pressure, central pulse pressure and augmentation pressure had higher atrial fibrillation recurrence rates (all P<0.05). Only central aortic stiffness indices were associated with lower survival free from atrial fibrillation using Kaplan-Meier analysis. CONCLUSION Aortic stiffness is an important risk factor in patients with lone atrial fibrillation and contributes to higher atrial fibrillation recurrence following catheter ablation procedure.
Keywords: Aorta; Humans; Atrial Fibrillation; Recurrence; Catheter Ablation; Treatment Outcome; Risk Factors; Survival Analysis; Case-Control Studies; Follow-Up Studies; Time Factors; Aged; Middle Aged; Female; Male; Vascular Stiffness; Arterial Pressure
Rights: © 2013 Lau et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
RMID: 0020133565
DOI: 10.1371/journal.pone.0076776
Appears in Collections:Medicine publications

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