Association of Impaired Glucose Regulation and Insulin Resistance With Cardiac Structure and Function: Results From ECHO-SOL (Echocardiographic Study of Latinos)

Circ Cardiovasc Imaging. 2016 Oct;9(10):e005032. doi: 10.1161/CIRCIMAGING.116.005032.

Abstract

Background: We examined the relationship between glucose homeostasis and comprehensive measures of cardiac structure and function among a representative sample of US Hispanics.

Methods and results: ECHO-SOL (Echocardiographic Study of Latinos), an echocardiographic ancillary study of the HCHS/SOL (Hispanic Community Health Study/Study of Latinos), enrolled 1818 Hispanic/Latino men (43%) and women (57%) aged ≥45 years (mean=56). Glucose intolerance was defined as follows: (1) prediabetes: hemoglobin (HbA1c) ≥5.7 and <6.5% and (2) diabetes mellitus: fasting plasma glucose ≥126 mg/dL, 2-hour postload glucose ≥200 mg/dL, HbA1c ≥6.5%, or hypoglycemic agent use. Uncontrolled diabetes mellitus was defined as HbA1c ≥7.0%. Insulin resistance was defined using the homeostatic model assessment for insulin resistance. Echocardiography examinations assessed left ventricular structure and systolic/diastolic function. Multivariable linear and logistic regression models were used. Prediabetes prevalence was 42%, and diabetes mellitus prevalence was 28% (47% uncontrolled). Glucose intolerance was associated with increased left ventricular posterior wall and interventricular septal and relative wall thicknesses (all P<0.05), reduced ejection fraction (P<0.01), reduced stroke and end-diastolic volumes (both P<0.001), decreased peak E' velocity (lateral and septal P<0.001), and increased E/E' ratio (lateral and septal P<0.01). The odds ratios (95% confidence intervals) for diastolic dysfunction among individuals with prediabetes and diabetes mellitus (versus diabetes mellitus free) were 1.36 (0.96-1.9) and 1.90 (1.3-2.8), respectively(P=0.006). Results were consistent for uncontrolled diabetes mellitus versus diabetes mellitus. Homeostatic model assessment for insulin resistance was associated with increased E/E' (P<0.001), and greater relative wall thickness and septal thickness (both P<0.05); lower stroke volume (P<0.0001); and lower peak lateral and septal E' velocities (both P<0.01).

Conclusions: Glucose intolerance and insulin resistance are associated with unfavorable cardiac structure and function, particularly worsened measures of diastolic function, even before the development of diabetes mellitus.

Keywords: diabetes mellitus; diabetic cardiomyopathy; echocardiography; insulin resistance; prediabetic state.

Publication types

  • Multicenter Study

MeSH terms

  • Biomarkers / blood
  • Blood Glucose / metabolism
  • Cross-Sectional Studies
  • Diabetes Mellitus / blood
  • Diabetes Mellitus / diagnosis
  • Diabetes Mellitus / ethnology*
  • Diabetic Cardiomyopathies / diagnostic imaging*
  • Diabetic Cardiomyopathies / ethnology
  • Diabetic Cardiomyopathies / physiopathology
  • Diastole
  • Echocardiography, Doppler, Color*
  • Female
  • Glycated Hemoglobin A / metabolism
  • Hispanic or Latino*
  • Humans
  • Insulin Resistance / ethnology
  • Linear Models
  • Logistic Models
  • Male
  • Middle Aged
  • Multivariate Analysis
  • Odds Ratio
  • Prediabetic State / blood
  • Prediabetic State / diagnosis
  • Prediabetic State / ethnology
  • Predictive Value of Tests
  • Prevalence
  • Risk Factors
  • Stroke Volume
  • Systole
  • United States / epidemiology
  • Ventricular Function, Left*

Substances

  • Biomarkers
  • Blood Glucose
  • Glycated Hemoglobin A
  • hemoglobin A1c protein, human