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Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
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Body mass index, type 2 diabetes, and left ventricular function.

Katrine Dina Musaeus1, Manan Pareek2,3

  • 1Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200, Copenhagen N, Denmark.

Cardiovascular Diabetology
|January 6, 2018
PubMed
Summary

Overweight individuals with type 2 diabetes show reduced heart strain, unlike those without diabetes. This finding impacts cardiovascular risk assessment using body mass index.

Keywords:
Body mass indexDiabetes mellitus, type 2Ventricular dysfunction, leftVentricular function, left

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Area of Science:

  • Cardiology
  • Metabolic Diseases
  • Echocardiography

Background:

  • Body mass index (BMI) is a common metric for assessing cardiovascular risk.
  • Previous studies linked higher BMI to diastolic dysfunction and increased left ventricular mass, particularly in individuals without diabetes.
  • The relationship between BMI, metabolic status, and cardiac function needs further elucidation.

Purpose of the Study:

  • To investigate the association between overweight status, type 2 diabetes, and cardiac function, specifically global longitudinal strain (GLS).
  • To explore discrepancies in cardiovascular risk assessment based on BMI in diabetic versus non-diabetic populations.

Main Methods:

  • Analysis of echocardiographic data, focusing on preserved left ventricular ejection fraction (LVEF) ≥ 55%.
  • Comparison of global longitudinal strain (GLS) between overweight patients (BMI ≥ 25 kg/m²) with and without type 2 diabetes mellitus.
  • Statistical analysis to determine the significance of observed differences.

Main Results:

  • Overweight patients with type 2 diabetes exhibited significantly lower GLS compared to overweight patients without diabetes, despite preserved LVEF.
  • No significant difference in GLS was observed between overweight patients without diabetes and a presumed normal-weight group (not explicitly stated but implied by contrast).
  • These findings contrast with prior research linking BMI to diastolic dysfunction and increased left ventricular mass in non-diabetic individuals.

Conclusions:

  • Overweight status in the presence of type 2 diabetes is associated with impaired myocardial strain, even with preserved ejection fraction.
  • BMI alone may be insufficient for comprehensive cardiovascular risk stratification in patients with type 2 diabetes.
  • Further research is needed to understand the complex interplay between metabolic factors, BMI, and cardiac mechanics.