Related Experiment Videos
Aortic distensibility abnormalities in coronary artery disease
The American Journal of Cardiology
|June 1, 1987
Summary
Coronary artery disease (CAD) patients exhibit significantly reduced aortic distensibility compared to healthy individuals. This decreased elasticity in the aorta may be linked to atherosclerosis or impaired blood flow within the aortic wall.
Area of Science:
- Cardiovascular Physiology
- Vascular Biology
- Medical Imaging
Background:
- Atherosclerosis in animal models reduces arterial vasodilatory capacity.
- It is hypothesized that aortic distensibility may be impaired in patients with coronary artery disease (CAD).
Purpose of the Study:
- To investigate and compare aortic distensibility between patients with CAD and age-matched healthy subjects.
- To determine if CAD is associated with abnormal aortic elasticity.
Main Methods:
- Aortic distensibility was measured in 24 normotensive CAD patients with angiographically normal aortas and 18 healthy controls.
- Aortic diameters were assessed at three levels above the aortic valve using angiographic techniques.
- Distensibility was calculated using established formulas based on aortic diameter and pressure changes.
Main Results:
- CAD patients demonstrated significantly lower aortic distensibility across all measured levels compared to normal subjects (p < 0.02).
- Mean aortic distensibility was markedly reduced in CAD patients (1.6 +/- 0.1) versus controls (3.4 +/- 0.4, p < 0.001).
- Aortic pressures were similar between the groups, indicating distensibility as the primary difference.
Conclusions:
- Patients with coronary artery disease exhibit reduced aortic distensibility.
- This diminished elasticity may be a consequence of the underlying atherosclerotic process or reduced blood flow to the aorta's vasa vasorum.