[Atherosclerosis in subjects with mild hyperglycemia]

Area of Science:

• Cardiovascular Science
• Endocrinology
• Metabolic Syndrome

Context:

• Mild hyperglycemia, defined by Oral Glucose Tolerance Test (OGTT) criteria, affects a significant population.
• Carotid artery intima-media thickness (IMT) is a marker for atherosclerosis.
• Understanding early arterial changes in mild hyperglycemia is crucial for preventative strategies.

Purpose:

• To quantitatively assess carotid artery intima-media thickness (IMT) in individuals with mild hyperglycemia.
• To compare IMT in subjects with impaired glucose tolerance (IGT) and non-IGT hyperglycemia with normal controls and diabetics.
• To identify risk factors associated with increased IMT in mild hyperglycemia.

Summary:

• Subjects with mild hyperglycemia (IGT and non-IGT) exhibited significantly thicker carotid artery IMT compared to normal volunteers across all age groups.
• The IMT in hyperglycemic subjects was comparable to that of diagnosed diabetic patients.
• Atherosclerosis risk factors linearly increased IMT in mild hyperglycemia.
• Hyperglycemia with hyperinsulinemia post-OGTT correlated with higher IMT than hypoglycemia with hypoinsulinemia.
• Insulin resistance, not insulin secretion, was inversely related to IMT, indicating its role in carotid arteriosclerosis.

Impact:

• Identifies insulin resistance as a key risk factor for carotid arteriosclerosis in mild hyperglycemia.
• Highlights the clinical significance of early detection and management of mild hyperglycemia to prevent cardiovascular complications.
• Provides quantitative data on arterial wall changes in pre-diabetic states, informing future research and clinical guidelines.