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Different effects of hypertension, atherosclerosis and hyperlipidaemia on arterial distensibility
M Barenbrock1, C Spieker, S Kerber
1Department of Medicine D, University of Munster, Germany.
Insights
Hypertension significantly alters large artery elasticity, more so than hyperlipidaemia or atherosclerosis. Arterial compliance is only affected by extensive atherosclerosis.
Area of Science:
- Cardiovascular physiology
- Vascular biology
- Biomedical engineering
Background:
- Large artery elasticity is crucial for cardiovascular health.
- Hypertension, hyperlipidaemia, and atherosclerosis are major risk factors for cardiovascular disease.
- Understanding their distinct effects on arterial properties is vital for targeted interventions.
Purpose of the Study:
- To differentiate the impact of hypertension, hyperlipidaemia, and atherosclerosis on the visco-elastic properties of large arteries.
- To identify the primary determinant of altered arterial mechanics among these conditions.
Main Methods:
- Vessel wall properties were assessed in patients undergoing coronary arteriography.
- Common carotid artery distensibility was measured using multigate Doppler.
- Blood pressure was recorded via finger plethysmography.
Main Results:
- Hypertension significantly reduced arterial distensibility compared to controls and less severe coronary artery disease.
- Arterial distensibility was not significantly altered in patients with hyperlipidaemia or mild-to-moderate atherosclerosis.
- Extensive atherosclerosis (two- or three-vessel disease) showed a trend towards reduced distensibility, but not statistically significant.
Conclusions:
- Hypertension is the predominant factor influencing the visco-elastic properties of large arteries.
- Significant alterations in arterial compliance are primarily associated with extensive atherosclerosis.
- These findings highlight the distinct pathophysiological roles of hypertension and atherosclerosis in vascular aging.
Objective:
To investigate the different effects of hypertension, hyperlipidaemia and atherosclerosis on the visco-elastic properties of large arteries.
Design:
Vessel wall properties were determined in patients who had been subjected for the first time to coronary arteriography. Normotensive patients with no coronary disease (n = 15), one-vessel disease (n = 15) or two- or three-vessel disease (n = 15), 15 treated hypertensive patients (mean +/- SEM duration of hypertension 9.6 +/- 1.7 years) with no coronary disease and normocholesterolaemia and 15 healthy controls were matched for blood pressure, age and sex.
Methods:
Arterial distension of the common carotid artery was determined by using a multigate Doppler system. The blood pressure curve was recorded by finger plethysmography.
Results:
The end-diastolic diameter was significantly higher in the hypertensives (P<0.05) but not significantly different in the normotensives compared with the controls. Arterial distensibility was significantly lower in the hypertensive group [(13.3 +/- 0.8) x 10(-3)/kPa] than in the controls [(19.1 +/- 1.5) x 10(-3)/kP; P<0.01), in the group with no coronary disease [(18.8 +/- 1.3) x 10(-3)/kPa; P<0.01] and in those with one-vessel disease [(17.7 +/- 1.4) x 10(-3)/kPa; P<0.05]. Arterial distensibility was not significantly lower in the hypertensives than in the group with two- or three-vessel disease [(15.0 +/- 1.0) x 10(-3)/kPa; NS). No significant correlation was found between cholesterol or lipoprotein(a) levels and arterial distensibility in the normotensive patients.
Conclusions:
Hypertension is the predominant factor affecting the visco-elastic properties of large arteries. Arterial compliance is significantly altered only in extensive atherosclerosis.