Amparo L Figueroa1, Richard A P Takx1, Megan H MacNabb1, Amr Abdelbaky1, Zachary R Lavender1, Rebecca S Kaplan1, Quynh A Truong1, Janet Lo1, Brian B Ghoshhajra1, Steven K Grinspoon1, Udo Hoffmann1, Ahmed Tawakol2. 1. From the Cardiac MR PET CT Program, Department of Imaging and Division of Cardiology (A.L.F., R.A.P.T., M.H.M., A.A., Z.R.L., R.S.K., B.B.G., U.H., A.T.), Program in Nutritional Metabolism (J.L., S.K.G.), and Division of Cardiology, Department of Medicine (A.T.), Massachusetts General Hospital and Harvard Medical School, Boston; Department of Radiology, University Medical Center Utrecht, Utrecht, the Netherlands (R.A.P.T.); and Department of Radiology, Weill Cornell College of Medicine, New York, NY (Q.A.T.). 2. From the Cardiac MR PET CT Program, Department of Imaging and Division of Cardiology (A.L.F., R.A.P.T., M.H.M., A.A., Z.R.L., R.S.K., B.B.G., U.H., A.T.), Program in Nutritional Metabolism (J.L., S.K.G.), and Division of Cardiology, Department of Medicine (A.T.), Massachusetts General Hospital and Harvard Medical School, Boston; Department of Radiology, University Medical Center Utrecht, Utrecht, the Netherlands (R.A.P.T.); and Department of Radiology, Weill Cornell College of Medicine, New York, NY (Q.A.T.). atawakol@partners.org.
Abstract
BACKGROUND: The objective of this study was to evaluate how different measures of adiposity are related to both arterial inflammation and the risk of subsequent cardiovascular events. METHODS AND RESULTS: We included individuals who underwent (18)F-fluorodeoxyglucose positron emission tomography/computed tomography imaging for oncological evaluation. Subcutaneous adipose tissue (SAT) volume, visceral adipose tissue (VAT) volume, and VAT/SAT ratio were determined. Additionally, body mass index, metabolic syndrome, and aortic (18)F-fluorodeoxyglucose uptake (a measure of arterial inflammation) were determined. Subsequent development of cardiovascular disease (CVD) events was adjudicated. The analysis included 415 patients with a median age of 55 (P25-P75: 45-65) and a median body mass index of 26.4 (P25-P75: 23.4-30.9) kg/m(2). VAT and SAT volume were significantly higher in obese individuals. VAT volume (r=0.290; P<0.001) and VAT/SAT ratio (r=0.208; P<0.001) were positively correlated with arterial inflammation. Thirty-two subjects experienced a CVD event during a median follow-up of 4 years. Cox proportional hazard models showed that VAT volume and VAT/SAT ratio were associated with CVD events (hazard ratio [95% confidence interval]: 1.15 [1.06-1.25]; P<0.001; 3.60 [1.88-6.92]; P<0.001, respectively). Body mass index, metabolic syndrome, and SAT were not predictive of CVD events. CONCLUSIONS: Measures of visceral fat are positively related to arterial inflammation and are independent predictors of subsequent CVD events. Individuals with higher measures of visceral fat as well as elevated arterial inflammation are at highest risk for subsequent CVD events. The findings suggest that arterial inflammation may explain some of the CVD risk associated with adiposity.
BACKGROUND: The objective of this study was to evaluate how different measures of adiposity are related to both arterial inflammation and the risk of subsequent cardiovascular events. METHODS AND RESULTS: We included individuals who underwent (18)F-fluorodeoxyglucose positron emission tomography/computed tomography imaging for oncological evaluation. Subcutaneous adipose tissue (SAT) volume, visceral adipose tissue (VAT) volume, and VAT/SAT ratio were determined. Additionally, body mass index, metabolic syndrome, and aortic (18)F-fluorodeoxyglucose uptake (a measure of arterial inflammation) were determined. Subsequent development of cardiovascular disease (CVD) events was adjudicated. The analysis included 415 patients with a median age of 55 (P25-P75: 45-65) and a median body mass index of 26.4 (P25-P75: 23.4-30.9) kg/m(2). VAT and SAT volume were significantly higher in obese individuals. VAT volume (r=0.290; P<0.001) and VAT/SAT ratio (r=0.208; P<0.001) were positively correlated with arterial inflammation. Thirty-two subjects experienced a CVD event during a median follow-up of 4 years. Cox proportional hazard models showed that VAT volume and VAT/SAT ratio were associated with CVD events (hazard ratio [95% confidence interval]: 1.15 [1.06-1.25]; P<0.001; 3.60 [1.88-6.92]; P<0.001, respectively). Body mass index, metabolic syndrome, and SAT were not predictive of CVD events. CONCLUSIONS: Measures of visceral fat are positively related to arterial inflammation and are independent predictors of subsequent CVD events. Individuals with higher measures of visceral fat as well as elevated arterial inflammation are at highest risk for subsequent CVD events. The findings suggest that arterial inflammation may explain some of the CVD risk associated with adiposity.
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