Clinical and Echocardiographic Correlates of Left Atrial Function Index: The Framingham Offspring Study
Division of Cardiovascular Medicine, Department of Medicine
Cardiology | Cardiovascular Diseases | Clinical Epidemiology | Epidemiology | Translational Medical Research
BACKGROUND: Left atrial (LA) remodeling is a predictor of cardiovascular disease (CVD). We performed measurement of the LA function index (LAFI), a composite measure of LA structure and function, in a community-based cohort and here report the distribution and cross-sectional correlates of LAFI.
METHODS: In 1,719 Framingham Offspring Study participants (54% women, mean age 66 +/- 9 years), we derived LAFI from the LA emptying fraction, left ventricular (LV) outflow tract velocity time integral, and indexed maximal LA volume. We used multivariable linear regression to assess the clinical and echocardiographic correlates of LAFI adjusting for age, sex, anthropometric measurements, and CVD risk factors.
RESULTS: The average LAFI was 35.2 +/- 12.1. Overall, LAFI declined with advancing age (beta = -0.27, P < .001). LAFI was significantly higher (37.5 +/- 11.6) in a subgroup of participants free of CVD and CVD risk factors compared with those with either of these conditions (34.5 +/- 12.2). In multivariable models, LAFI was inversely related to antihypertensive use (beta = -1.26, P = .038), prevalent atrial fibrillation (beta = -4.46, P = .001), heart failure (beta = -5.86, P = .008), and coronary artery disease (beta = -2.01, P = .046). In models adjusting for echocardiographic variables, LAFI was directly related to LV ejection fraction (beta = 14.84, P < .001) and inversely related to LV volume (beta = -7.03, P < .001).
CONCLUSIONS: LAFI was inversely associated with antihypertensive use and prevalent CVD and was related to established echocardiographic traits of LV remodeling. Our results offer normative ranges for LAFI in a white community-based sample and suggest that LAFI represents a marker of pathological atrial remodeling.
Atrial fibrillation, Cardiovascular diseases, Echocardiography, Epidemiology, Left atrial function, Left atrial function index, UMCCTS funding
DOI of Published Version
J Am Soc Echocardiogr. 2017 Sep;30(9):904-912.e2. doi: 10.1016/j.echo.2017.05.013. Epub 2017 Jul 20. Link to article on publisher's site
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography
Sardana M, Ogunsua A, Vaze A, Aurigemma GP, McManus DD, Parikh NI. (2017). Clinical and Echocardiographic Correlates of Left Atrial Function Index: The Framingham Offspring Study. UMass Center for Clinical and Translational Science Supported Publications. https://doi.org/10.1016/j.echo.2017.05.013. Retrieved from https://escholarship.umassmed.edu/umccts_pubs/173