What does hemodynamic mean?

What does hemodynamics mean?

The blood flow in the vessels is determined by various factors. Some of them in turn mutually influence each other.

• The viscosity of the blood, i.e. its viscosity, is one of these factors. If it contains more cells, it is more viscous. The deformability of the blood cells also influences the flow properties of the blood.
• Also the Blood pressure belongs to the hemodynamic forces. The same applies to the stroke volume, the amount of blood that the heart expels during a contraction.
• It is particularly easy to understand that the diameter of a vessel also has an influence on hemodynamics.
• The fact that the arteries have elastic walls not only makes a steady flow of blood possible at all, but also affects its quality.


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How are the hemodynamic forces regulated?

The regulates via the above-mentioned factors body overall the hemodynamics. But what does that mean in detail and how are we regulated by these forces?

• The autonomic nervous system primarily controls the functioning of the cardiovascular system, such as heartbeat and blood pressure.
• Its two parts, the sympathetic and the parasympathetic, have opposite effects. With regard to heartbeat and blood pressure, this means that the sympathetic nervous system has a stimulating effect, while the parasympathetic nervous system has a relaxing effect.
• Hormones also control hemodynamic forces. Adrenaline and noradrenaline, for example, have a stimulating effect on the cardiovascular system as a whole.
• What is particularly astonishing, however, is the local regulation by hormones that are produced in the vessel walls themselves. In the event of a high load, you can not only relax the blood vessels, but also strengthen your muscles.