TY - JOUR
T1 - Insulin resistance, subclinical left ventricular remodeling, and the obesity paradox
T2 - MESA (Multi-Ethnic Study of Atherosclerosis)
AU - Shah, Ravi V.
AU - Abbasi, Siddique A.
AU - Heydari, Bobak
AU - Rickers, Carsten
AU - Jacobs, David R.
AU - Wang, Lu
AU - Kwong, Raymond Y.
AU - Bluemke, David A.
AU - Lima, Joao A.C.
AU - Jerosch-Herold, Michael
N1 - Funding Information:
The MESA trial was supported by contracts N01-HC-95159 through N01-HC-95169 from the National Heart, Lung, and Blood Institute. Dr. Shah is supported by an American Heart Association post-doctoral fellowship award (11POST000002) and a training grant from the Heart Failure National Institutes of Health Clinical Research Network ( U01-HL084877 ). Dr. Jerosch-Herold receives support through contract R01-HL-65580. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.
PY - 2013/4/23
Y1 - 2013/4/23
N2 - Objectives: This study assessed whether impaired fasting glucose (IFG), insulin resistance, and waist-to-hip ratio (WHR) had effects on cardiac remodeling, independent of obesity, in the MESA (Multi-Ethnic Study of Atherosclerosis) trial. Background: Recent studies have suggested that central obesity and insulin resistance may be primary mediators of obesity-related cardiac remodeling independent of body mass index (BMI). Methods: We investigated 4,364 subjects without diabetes in the MESA trial. IFG (100 to 125 mg/dl) or insulin resistance (by homeostatic model assessment of insulin resistance [HOMA-IR]) and WHR were used for cardiometabolic phenotyping. Multivariate linear regression analysis was used to determine the effects of the cardiometabolic markers on left ventricular (LV) remodeling, assessed primarily through the LV mass-to-volume ratio obtained by cine cardiac magnetic resonance imaging. Results: Individuals with IFG were more likely to be older and hypertensive, with increased prevalence of cardiometabolic risk factors regardless of BMI. In each quartile of BMI, subjects with above-median HOMA-IR, above-median WHR, or IFG had a higher LV mass-to-volume ratio (p < 0.05 for all). HOMA-IR (p < 0.0001), WHR (p < 0.0001), and the presence of IFG (p = 0.04), but not BMI (p = 0.24), were independently associated with LV mass-to-volume ratio after adjustment for age, sex, hypertension, race, and dyslipidemia. Conclusions: Insulin resistance and WHR were associated with concentric LV remodeling independent of BMI. These results support the emerging hypothesis that the cardiometabolic phenotype, defined by insulin resistance and central obesity, may play a critical role in LV remodeling independently of BMI.
AB - Objectives: This study assessed whether impaired fasting glucose (IFG), insulin resistance, and waist-to-hip ratio (WHR) had effects on cardiac remodeling, independent of obesity, in the MESA (Multi-Ethnic Study of Atherosclerosis) trial. Background: Recent studies have suggested that central obesity and insulin resistance may be primary mediators of obesity-related cardiac remodeling independent of body mass index (BMI). Methods: We investigated 4,364 subjects without diabetes in the MESA trial. IFG (100 to 125 mg/dl) or insulin resistance (by homeostatic model assessment of insulin resistance [HOMA-IR]) and WHR were used for cardiometabolic phenotyping. Multivariate linear regression analysis was used to determine the effects of the cardiometabolic markers on left ventricular (LV) remodeling, assessed primarily through the LV mass-to-volume ratio obtained by cine cardiac magnetic resonance imaging. Results: Individuals with IFG were more likely to be older and hypertensive, with increased prevalence of cardiometabolic risk factors regardless of BMI. In each quartile of BMI, subjects with above-median HOMA-IR, above-median WHR, or IFG had a higher LV mass-to-volume ratio (p < 0.05 for all). HOMA-IR (p < 0.0001), WHR (p < 0.0001), and the presence of IFG (p = 0.04), but not BMI (p = 0.24), were independently associated with LV mass-to-volume ratio after adjustment for age, sex, hypertension, race, and dyslipidemia. Conclusions: Insulin resistance and WHR were associated with concentric LV remodeling independent of BMI. These results support the emerging hypothesis that the cardiometabolic phenotype, defined by insulin resistance and central obesity, may play a critical role in LV remodeling independently of BMI.
KW - LV remodeling
KW - MESA
KW - metabolic syndrome
KW - obesity
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U2 - 10.1016/j.jacc.2013.01.053
DO - 10.1016/j.jacc.2013.01.053
M3 - Article
C2 - 23500236
AN - SCOPUS:84876244385
SN - 0735-1097
VL - 61
SP - 1698
EP - 1706
JO - Journal of the American College of Cardiology
JF - Journal of the American College of Cardiology
IS - 16
ER -