Orthostatic

The term "orthostatic" refers to the upright position of the human body or related conditions. It is usually used to describe changes in the body that occur when a person moves from a horizontal position (lying or sitting) to a vertical position (standing).

The most common use of this term is orthostatic hypotension. It is characterized by a sharp drop in blood pressure (20 mmHg or more for systolic or 10 mmHg for diastolic) within 3 minutes after a person gets out of bed or chair. This occurs due to a disruption in the mechanisms of maintaining constant blood pressure when changing body position.

Another example is orthostatic tachycardia - an increase in heart rate when moving to an upright position. Both of these conditions can cause symptoms such as dizziness, weakness, and loss of consciousness.

Thus, the term “orthostatic” allows us to describe changes in the human body associated with a change in body position from horizontal to vertical. This is important for understanding the mechanisms of regulation of hemodynamics and other physiological parameters of the body.

Orthostatic is an adjective that refers to the upright position of the body. This term is usually used to describe the upright posture of a person or related conditions.

For example, orthostatic hypotension is a sharp drop in blood pressure in a patient when moving from a horizontal to a vertical position. This occurs due to dysregulation of vascular tone and circulating blood volume.

When moving to a vertical position, blood is redistributed to the lower extremities and abdominal organs under the influence of gravity. In healthy people, in response to this, compensatory mechanisms are activated that maintain blood pressure. However, with orthostatic hypotension, these mechanisms are disrupted, which leads to a sharp drop in pressure and the appearance of symptoms such as weakness, dizziness, and darkening of the eyes.

Thus, the term "orthostatic" is used to describe the upright posture of the human body and the associated physiological and pathological conditions.

Orthostatic (“orthostatic” – pertaining to standing or standing upright) are often used terms in which “ortho-”, indicating verticality, implies more than a simple attachment to the verb. This often occurs in medical and human physical terminology, where the term is particularly interesting. In this context, "o-ortho" is the Greek α + βξίω and means "prone to apathy, lazy." In other words, it is more an indication that these terms refer to the position of a person (a term from Greece) being in a physically upright position.

The orthostatic reaction is the change that occurs in the body when the body is transferred from a horizontal to a vertical position. It occurs when blood circulation is compromised or controlled when the veins of the heart and upper body fill with blood and raise the weight of blood in the heart, reducing overall pressure. When the orthostatic state lasts for some time, the need of blood cells for oxygen increases and blood circulation decreases, leading to disruption of blood distribution throughout the body.