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Relationship between QRS duration and incident atrial fibrillation.

TitleRelationship between QRS duration and incident atrial fibrillation.
Publication TypeJournal Article
Year of Publication2018
AuthorsAeschbacher S, O'Neal WT, Krisai P, Loehr LR, Chen LYee, Alonso A, Soliman EZ
Secondary AuthorsConen D
JournalInt J Cardiol
Date Published2018 Sep 01
KeywordsAtrial Fibrillation, Cohort Studies, Electrocardiography, Female, Follow-Up Studies, Heart Rate, Humans, Incidence, Male, Middle Aged, Prospective Studies, Risk Factors

BACKGROUND: QRS duration (QRSd), a measure of ventricular conduction, has been associated with adverse cardiovascular outcomes, but its relationship with incident atrial fibrillation (AF) is poorly understood.

METHODS AND RESULTS: This study included 15,314 participants from the Atherosclerosis Risk in Communities (ARIC) study who were free of AF at baseline. QRSd was automatically measured from resting 12-lead electrocardiograms (ECGs) at baseline. Incident AF cases were systematically ascertained using ECGs, hospital discharge diagnoses and death certificates. Multivariable adjusted Cox regression analyses were performed to investigate the relationship between QRSd and incident AF. Mean age of our population was 54 ± 6 years (55% females). During a median follow-up of 21.2 years, 2041 confirmed incident AF cases occurred. In multivariable adjusted Cox models, a 1-SD increase in QRSd was associated with a hazard ratio (HR) (95% CI) for AF of 1.05 (1.01; 1.10), p = 0.01. This relationship was significant among women (HR per 1-SD increase in QRSd (95% CI) 1.13 (1.06; 1.20), p 

CONCLUSION: In this large population-based study, QRSd was an independent predictor of incident AF among women, but not in men. Further studies are needed to better understand the underlying mechanisms.

Alternate JournalInt J Cardiol
PubMed ID29887479
PubMed Central IDPMC6027639
Grant List16EIA26410001 / / American Heart Association-American Stroke Association / United States
HHSN268201100012C / HL / NHLBI NIH HHS / United States