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Relation between extent of coronary artery disease and blood viscosity
Insights
Higher blood viscosity, influenced by packed cell volume and fibrinogen, is linked to extensive coronary artery disease in men. This finding suggests a potential association warranting further research into cardiovascular health.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Biophysics
Background:
- Blood viscosity is a critical hemorheological parameter.
- Determinants of blood viscosity include packed cell volume, plasma fibrinogen, and plasma viscosity.
- Understanding these factors' role in coronary artery disease (CAD) is important.
Purpose of the Study:
- To investigate the relationship between blood viscosity and the extent of coronary artery disease.
- To identify the specific determinants of blood viscosity associated with severe CAD.
Main Methods:
- Blood viscosity and its determinants were measured in 50 men (aged 30-55) before coronary angiography.
- Participants were categorized based on the extent of coronary artery stenosis (extensive vs. mild/none).
- Comparison included 25 healthy controls.
Main Results:
- Men with extensive CAD exhibited significantly higher mean blood viscosity compared to those with mild/no CAD and controls (p < 0.001).
- Increased blood viscosity was attributed to higher packed cell volume and plasma fibrinogen concentration.
- Plasma viscosity did not differ significantly between groups.
Conclusions:
- Elevated blood viscosity is associated with extensive coronary artery disease in middle-aged men.
- Higher packed cell volume and fibrinogen concentration contribute to this increased viscosity.
- The findings suggest a potential role for hemorheological factors in CAD progression.
Abstract:
Blood viscosity (shear rate 100/s) and its major determinants (packed cell volume, plasma fibrinogen concentration, and plasma viscosity) were measured before coronary angiography in 50 men aged 30-55 and related to the extent of coronary artery disease. Twenty-six men had extensive disease (stenosis of two or three major coronary vessels), and 24 had either stenosis of one vessel or no stenosis. The 26 men with extensive disease had significantly higher mean blood viscosity than those with mild or no disease and 25 healthy controls (p less than 0.001). The increased viscosity was due partly to a higher packed cell volume and partly to a higher fibrinogen concentration; plasma viscosity was not significantly increased. These differences could not be explained by smoking history. These results suggest an association between increased blood viscosity and extensive coronary artery disease in men, which merits further investigation.