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Undiagnosed dysglycaemia and inflammation in cardiovascular disease
O E Johansen1, K I Birkeland, E Brustad
1Diabetic Out-Patient Clinic, Medical Department, Asker and Baerum Hospital, RUD, Oslo, Norway. odd.erik.johansen@broadpark.no
Insights
Undiagnosed dysglycaemia (high blood glucose) is common in patients with cardiovascular disease, affecting nearly half of those with coronary artery disease. Inflammation levels correlate with blood glucose, highlighting a link between glucose metabolism and vascular complications.
Area of Science:
- Cardiology
- Endocrinology
- Metabolic Disorders
Background:
- Cardiovascular disease is linked to elevated glucose, but dysglycaemia prevalence in these conditions is unclear.
- This study investigates unknown dysglycaemia and inflammation in Caucasian patients with ischaemic vascular complications.
Purpose of the Study:
- To determine the prevalence of undiagnosed dysglycaemia (impaired fasting glycaemia, impaired glucose tolerance, or diabetes mellitus) in patients with coronary artery disease (CAD), cerebrovascular disease (CVD), and peripheral artery disease (PAD).
- To examine the association between dysglycaemia and inflammatory markers in these patient groups.
Main Methods:
- A case-controlled study involving 149 patients with CAD, PAD, or CVD and 59 healthy controls.
- Dysglycaemia was assessed using a 75-g oral glucose tolerance test based on WHO/ADA criteria.
- Fasting blood samples were analyzed for inflammatory parameters.
Main Results:
- Dysglycaemia prevalence was significantly higher in patients (49% CAD, 55% CVD, 57% PAD) compared to controls (29%).
- Odds ratios for dysglycaemia were elevated for CAD (1.7), CVD (1.9), and PAD (2.0).
- Inflammatory markers were elevated in patient groups and increased with higher blood glucose levels; specific anti-inflammatory markers were reduced.
Conclusions:
- Undiagnosed dysglycaemia is prevalent across different ischaemic cardiovascular manifestations.
- A dose-dependent relationship exists between inflammation and glucose levels in patients with cardiovascular disease.
Background:
Cardiovascular (CV) disease is associated with increased levels of glucose, but the prevalence of dysglycaemia in CV diseases is not fully known. The study examined the prevalence of unknown dysglycaemia and its association with inflammation in Caucasian patients with ischaemic vascular complications, i.e. coronary artery disease (CAD), cerebrovascular disease (CVD) and peripheral artery disease (PAD).
Materials And Methods:
This case-controlled study involved 149 patients (mean age 68 years) hospitalized for CAD, PAD or CVD and 59 control-subjects (CTR) free from CV-disease. The prevalence of dysglycaemia according to WHO/ADA criteria (impaired fasting glycaemia, impaired glucose tolerance or diabetes mellitus) was assessed by a 75-g oral glucose tolerance test. Inflammatory parameters were analyzed in fasting samples.
Results:
Dysglycaemia was found in 49%, 55% and 57% of patients with CAD, CVD and PAD, respectively; all were significantly higher than among the controls (29%). The odds ratio (95% CI) for being dysglycaemic were 1.7 (1.04-2.77), 1.9 (1.19-3.06) and 2.0 (1.25-3.19) for CAD, CVD and PAD, respectively. Inflammatory markers (the total leucocyte count, soluble tumour necrosis factor-receptor type I, C-reactive protein) were elevated in patient groups and tended to increase with increasing blood glucose levels in all groups. The levels of the anti-inflammatory cytokine transforming growth factor-beta1 and insulin-like growth factor binding protein 3 were lowered in patients with CAD and, in patients with PAD, the former was inversely related to the levels of the blood glucose.
Conclusions:
Undiagnosed dysglycaemia was common in patients with ischaemic CV manifestations regardless of vascular bed involved. Inflammation was associated in a dosage-related manner to glucose levels.
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