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[The regional hemodynamic characteristics of subjects with different types of blood circulation]
Insights
Cardiac output influences regional blood flow in healthy men. Hyperkinetic circulation shows higher pulse blood filling, while hypokinetic circulation exhibits different vessel tone, except in the brain due to autoregulation.
Area of Science:
- Cardiovascular Physiology
- Hemodynamics Research
Background:
- Cardiac output varies among individuals, leading to different circulatory types.
- Understanding regional hemodynamic differences is crucial for cardiovascular health.
Purpose of the Study:
- To investigate regional hemodynamics in relation to cardiac output types.
- To analyze pulse blood filling and vessel tone in different circulatory states.
Main Methods:
- Categorization of 56 healthy men into hypo-, eu-, and hyperkinetic circulation subgroups.
- Rheoplethysmographic assessment of regional hemodynamics in the head, lungs, and shin.
Main Results:
- Pulse blood filling significantly varied across all studied regions based on circulation type.
- Hyperkinetic circulation demonstrated greater pulse blood filling compared to hypokinetic circulation.
- Opposite relationships were observed in the tone of large and middle vessels in the lungs and shin.
Conclusions:
- Circulation type is a significant determinant of regional pulse blood filling and vessel tone.
- The brain's circulation appears to be less affected by circulation type due to robust autoregulation.
Abstract:
The group of 56 young healthy men was divided into three subgroups according to the cardiac output values: hypo-, eu- and hyperkinetic types of circulation. Regional hemodynamics was studied in the head, lungs and shin by means of rheoplethysmographic technique. It has been shown that pulse blood filling of the vessels of all the regions studied significantly depends on the type of circulation. In persons with hyperkinetic type of circulation the pulse blood filling was more expressed than in those with hypokinetic type. The analysis of the tone of large and middle vessels of the lungs and shin has demonstrated opposite relations. The tone of head vessels reveals no correlation with the types of circulation. This fact may be explained by existence of pronounced autoregulation of the brain circulation.