Blood pressure is caused by the movement of blood through the vessels. At the moment of contraction of the heart, an increase in pressure occurs (systolic indicator), and at the moment of relaxation of the organ, a decrease in blood pressure occurs (diastolic indicator). Hypertension is one of the most common disorders of the cardiovascular system. This can be an independent pathology or a consequence of diseases of the kidneys, adrenal glands and other organs. Hypertension is most often diagnosed in men and women over 65 years of age.