How is intracranial artery resistance heighten to return a responsibility

Update Date: 2021-06-21 Source: Network

summary

Peripheral resistance vessels often appear in all parts of the body, especially in the brain. Blood flows through the vessels to the whole body and then back to the heart. The whole cycle is normal, if found abnormal, there will be a lot of harm and discomfort. Patients can be diagnosed and treated with any of these uncomfortable features. When patients with increased cerebral peripheral resistance vessels, it is necessary to enhance vigilance and do a good job in inspection, so what is the disease of increased cerebral peripheral resistance vessels?

How is intracranial artery resistance heighten to return a responsibility

First, peripheral resistance refers to peripheral vascular resistance: it depends on the cross-sectional area and vascular tension of small artery vascular bed, which is affected by vascular and humoral factors. It is defined as: RV = PM / QM. PM and QM represent average pressure and average flow rate respectively.

Second, according to Poiseuille's law, the resistance of a single vessel is inversely proportional to the fourth power of its diameter. Therefore, the blood flow resistance of cerebrovascular bed mainly comes from small vessels (20-40 μ in diameter). The resistance of blood flowing along the aorta to the vena cava suddenly increases many times in a short distance between the arteries and veins. This phenomenon is called resistance wall; the corresponding vessels are called resistance vessels.

Third, many clinical cerebrovascular diseases are related to the state of resistance vessels. Increase of blood viscosity, vasospasm and obstruction can cause increase of RV value.

matters needing attention

High cerebrovascular resistance generally indicates the symptoms of cerebral arteriosclerosis. Severe stenosis can cause insufficient cerebral blood supply or cerebral thrombosis. At present, the treatment is aimed at risk factors, such as hypertension, diabetes, hyperlipidemia and so on. Aspirin is used to prevent thrombosis.