Vivek G Patel1, Deepak K Gupta2, James G Terry2, Edmond K Kabagambe3, Thomas J Wang2, Aldolfo Correa4, Michael Griswold4, Herman Taylor5, John Jeffrey Carr2. 1. Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt Translational and Clinical Cardiovascular Research Center, Nashville, Tennessee. Electronic address: vivek.patel@vanderbilt.edu. 2. Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt Translational and Clinical Cardiovascular Research Center, Nashville, Tennessee. 3. Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt Translational and Clinical Cardiovascular Research Center, Nashville, Tennessee; Jackson Heart Study Vanguard Center at Vanderbilt University, Nashville, Tennessee. 4. University of Mississippi Medical Center, Jackson, Mississippi. 5. University of Mississippi Medical Center, Jackson, Mississippi; Morehouse School of Medicine, Atlanta, Georgia.
Abstract
OBJECTIVES: This study sought to assess whether body mass index (BMI) was associated with subclinical left ventricular (LV) systolic dysfunction in African-American individuals. BACKGROUND: Higher BMI is a risk factor for cardiovascular disease, including heart failure. Obesity disproportionately affects African Americans; however, the association between higher BMI and LV function in African Americans is not well understood. METHODS: Peak systolic circumferential strain (ECC) was measured by tagged cardiac magnetic resonance in 1,652 adult African-American participants of the Jackson Heart Study between 2008 and 2012. We evaluated the association between BMI and ECC in multivariate linear regression and restricted cubic spline analyses adjusted for prevalent cardiovascular disease, conventional cardiovascular risk factors, LV mass, and ejection fraction. In exploratory analyses, we also examined whether inflammation, insulin resistance, or volume of visceral adipose tissue altered the association between BMI and ECC. RESULTS: The proportions of female, nonsmokers, diabetic, and hypertensive participants rose with increase in BMI. In multivariate-adjusted models, higher BMI was associated with worse ECC (β = 0.052; 95% confidence interval: 0.028 to 0.075), even in the setting of preserved LV ejection fraction. Higher BMI was also associated with worse ECC when accounting for markers of inflammation (C-reactive protein, E-selection, and P-selectin), insulin resistance, and volume of visceral adipose tissue. CONCLUSIONS: Higher BMI is significantly associated with subclinical LV dysfunction in African Americans, even in the setting of preserved LV ejection fraction.
OBJECTIVES: This study sought to assess whether body mass index (BMI) was associated with subclinical left ventricular (LV) systolic dysfunction in African-American individuals. BACKGROUND: Higher BMI is a risk factor for cardiovascular disease, including heart failure. Obesity disproportionately affects African Americans; however, the association between higher BMI and LV function in African Americans is not well understood. METHODS: Peak systolic circumferential strain (ECC) was measured by tagged cardiac magnetic resonance in 1,652 adult African-American participants of the Jackson Heart Study between 2008 and 2012. We evaluated the association between BMI and ECC in multivariate linear regression and restricted cubic spline analyses adjusted for prevalent cardiovascular disease, conventional cardiovascular risk factors, LV mass, and ejection fraction. In exploratory analyses, we also examined whether inflammation, insulin resistance, or volume of visceral adipose tissue altered the association between BMI and ECC. RESULTS: The proportions of female, nonsmokers, diabetic, and hypertensiveparticipants rose with increase in BMI. In multivariate-adjusted models, higher BMI was associated with worse ECC (β = 0.052; 95% confidence interval: 0.028 to 0.075), even in the setting of preserved LV ejection fraction. Higher BMI was also associated with worse ECC when accounting for markers of inflammation (C-reactive protein, E-selection, and P-selectin), insulin resistance, and volume of visceral adipose tissue. CONCLUSIONS: Higher BMI is significantly associated with subclinical LV dysfunction in African Americans, even in the setting of preserved LV ejection fraction.
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