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Journal Article
Multicenter Study
Galectin-3 and incidence of atrial fibrillation: The Atherosclerosis Risk in Communities (ARIC) study.
American Heart Journal 2017 October
BACKGROUND: Galectin-3, a β-galactoside binding lectin involved in important regulatory roles in adhesion, inflammation, immunity, and fibrosis, may be relevant to atrial fibrillation (AF) etiology.
METHODS: We included 8,436 participants free of AF at baseline (1996-1998) and with measures of plasma galectin-3 from the Atherosclerosis Risk in Communities study. We ascertained incident AF through 2013 from study visit electrocardiograms, hospitalizations, and death certificates. Multivariable Cox proportional hazards models, adjusted for AF risk factors plus incident heart failure (HF) and coronary heart disease (CHD), were used to estimate hazard ratios for the association between galectin-3 and incident AF.
RESULTS: The mean age (SD) of participants was 62.6 (5.6) years, and the sample was comprised of 58.7% women and 21.2% blacks. During a median follow-up of 15.7 years, 1,185 incident cases of AF were observed. After adjusting for AF risk factors, participants with galectin-3 levels ≥90th percentile (19.5 ng/mL) had a significantly higher risk of incident AF when compared with the lowest quartile (4.4-11.9 ng/mL), with hazard ratios (95% CI) of 1.40 (1.04-1.89) for the 90th-<95th percentile and 1.51 (1.11-2.06) for the 95th-100th percentile. This association was attenuated and no longer statistically significant after accounting for incident CHD and HF as time-dependent variables.
CONCLUSIONS: Elevated plasma galectin-3 is associated with increased risk of incident AF. Galectin-3 may increase AF risk via pathways involving CHD and HF.
METHODS: We included 8,436 participants free of AF at baseline (1996-1998) and with measures of plasma galectin-3 from the Atherosclerosis Risk in Communities study. We ascertained incident AF through 2013 from study visit electrocardiograms, hospitalizations, and death certificates. Multivariable Cox proportional hazards models, adjusted for AF risk factors plus incident heart failure (HF) and coronary heart disease (CHD), were used to estimate hazard ratios for the association between galectin-3 and incident AF.
RESULTS: The mean age (SD) of participants was 62.6 (5.6) years, and the sample was comprised of 58.7% women and 21.2% blacks. During a median follow-up of 15.7 years, 1,185 incident cases of AF were observed. After adjusting for AF risk factors, participants with galectin-3 levels ≥90th percentile (19.5 ng/mL) had a significantly higher risk of incident AF when compared with the lowest quartile (4.4-11.9 ng/mL), with hazard ratios (95% CI) of 1.40 (1.04-1.89) for the 90th-<95th percentile and 1.51 (1.11-2.06) for the 95th-100th percentile. This association was attenuated and no longer statistically significant after accounting for incident CHD and HF as time-dependent variables.
CONCLUSIONS: Elevated plasma galectin-3 is associated with increased risk of incident AF. Galectin-3 may increase AF risk via pathways involving CHD and HF.
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