Causes of High blood pressure
How does healthy blood pressure develop in the first place?
There are two phases when the heart is doing its work (cardiac cycle): Systole, the pumping phase, where the heart muscle contracts. Diastole, the filling phase. So there are two alternating pressure phases: The higher systolic pressure is built up during the phase in which the heart muscle contracts, pumping the blood into the veins. The lower diastolic pressure occurs when the heart expands again after the pumping process in order to absorb fresh blood and bring it into circulation.
The large arteries close to the heart and the organ arteries, known as resistance vessels, are there to maintain an even pressure as much as possible. A person exercising needs a different blood flow than someone meditating.
As long as the vessels are permeable and elastic, blood pressure self-regulation usually works well. However, problems occur when an obstruction builds up in the vessels (arteriosclerosis, i.e. deposits) or the elasticity of the large arteries near the heart and the organ arteries decreases.
Vessels that are too narrow do not let the same amount of blood pass
Inelastic vessels can no longer balance peak blood pressure values well