Light to Moderate Habitual Alcohol Consumption Is Associated with Subclinical Ventricular and Left Atrial Mechanical Dysfunction in an Asymptomatic Population: Dose-Response and Propensity Analysis

Background The effects of light to moderate alcohol consumption on cardiac mechanics remain poorly understood. The aim of this study was to investigate the dose-response relationship between alcohol consumption and left ventricular (LV) and left atrial (LA) function using myocardial deformation. Methods In total 3,946 asymptomatic participants (mean age, 49.7 ± 10.7 years; 65% men) were consecutively studied using comprehensive echocardiography and two-dimensional speckle-tracking in a cross-sectional, retrospective manner. Global LV longitudinal and circumferential strain and LA strain were assessed and related to habitual alcohol consumption pattern (fewer than one, one to six, or more than six drinks per week) before and after propensity matching. Results With increasing weekly alcohol consumption, participants displayed greater LV eccentric remodeling, impaired diastolic function, and more attenuated global longitudinal strain, LA strain (adjusted coefficients, −1.07 [95% CI, −1.95 to −0.19] and −3.73 [95% CI, −5.36 to −2.11]), and early diastolic strain rates (adjusted coefficients, 0.07 [95% CI, 0.03–0.11] and 0.33 [95% CI, 0.24–0.42]) for one to six and more than six drinks per week, respectively ( P n  = 1,140), participants currently consuming more than one drink per week continued to have significantly attenuated global longitudinal strain and all LA mechanics compared with those consuming fewer than one drink per week ( P Conclusions Habitual alcohol consumption, even at light to moderate doses, is associated with both reduced LV and LA mechanics in a dose-dependent manner. Whether such observations are reversible or related to future atrial fibrillation deserves further study.