Related Experiment Videos
On the relationship between regional circulation and systemic blood pressure
M De Buyzere1, D L Clement, J De Sutter
1Department of Cardiology, University Hospital, Gent, Belgium.
The European Journal of Medicine
|May 1, 1993
Summary
This study reveals how blood flow and vascular resistance in the calf and finger change with blood pressure (BP). Lower BP is linked to better blood vessel dilation, while higher BP shows increased resistance.
Area of Science:
- Cardiovascular Physiology
- Vascular Biology
- Hypertension Research
Background:
- The relationship between regional circulation and systemic blood pressure (BP) is poorly understood, particularly in individuals with intermediate to low BP.
- Understanding these relationships is crucial for diagnosing and managing various cardiovascular conditions.
Purpose of the Study:
- To investigate the correlation between regional circulation (blood flow and vascular resistance) in the calf and finger and systemic blood pressure (BP).
- To examine these relationships across a wide BP spectrum, from low to high, and under different physiological conditions (rest and reactive hyperemia).
Main Methods:
- Seventy-five subjects with varying BP levels were studied.
- Venous occlusion plethysmography was used to measure blood flow and calculate vascular resistance in the calf and finger.
- Measurements were taken at rest and during reactive hyperemia, with BP assessed via office and 24-hour ambulatory monitoring.
Main Results:
- Finger blood flow was consistently higher, and resistance lower, than calf circulation across all BP levels.
- Significant positive correlations were found between calf and finger vascular resistance and BP (both office and ambulatory).
- The capacity for vasodilation decreased progressively as BP increased from low to high levels.
Conclusions:
- Regional vascular resistance in the calf and finger is closely related to systemic blood pressure across its entire range.
- Impaired vasodilation capacity is associated with increasing blood pressure levels.
- These findings highlight the importance of assessing regional circulation in relation to BP for a comprehensive understanding of cardiovascular health.