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Orthostatic hypotension, also known as postural hypotension, [2] is a medical condition wherein a person's blood pressure drops when they are standing up (orthostasis) or sitting down. Primary orthostatic hypotension is also often referred to as neurogenic orthostatic hypotension. [ 3 ]
Postural orthostatic tachycardia syndrome (POTS) is a condition characterized by an abnormally large increase in heart rate upon sitting up or standing. [1] POTS is a disorder of the autonomic nervous system that can lead to a variety of symptoms, [10] including lightheadedness, brain fog, blurred vision, weakness, fatigue, headaches, heart palpitations, exercise intolerance, nausea ...
Orthostatic syncope refers to syncope resulting from a postural decrease in blood pressure, termed orthostatic hypotension. [1] Orthostatic hypotension occurs when there is a persistent reduction in blood pressure of at least 20mmHg systolic or 10mmHg diastolic within 3 minutes of standing or being upright to 60 degrees on the head-up tilt table.
Orthostatic vital signs are a series of vital signs of a patient taken while the patient is supine, then again while standing. [1] The results are only meaningful if performed in the correct order (starting with supine position). [2][3][4] Used to identify orthostatic hypotension, [5] orthostatic vital signs are commonly taken in triage ...
Orthostatic hypotension, also called postural hypotension, is a common form of low blood pressure. [17] It occurs after a change in body position, typically when a person stands up from either a seated or lying position. [37] It is usually transient and represents a delay in the normal compensatory ability of the autonomic nervous system. [38]
Postural orthostatic tachycardia syndrome (POTS) is a disorder of the autonomic nervous system, which controls body functions we often don’t think about, such as heart rate and blood pressure.
Dysautonomia, autonomic failure, or autonomic dysfunction is a condition in which the autonomic nervous system (ANS) does not work properly. This may affect the functioning of the heart, bladder, intestines, sweat glands, pupils, and blood vessels. Dysautonomia has many causes, not all of which may be classified as neuropathic. [5]
Orthostatic intolerance occurs in humans because standing upright is a fundamental stressor, so requires rapid and effective circulatory and neurologic compensations to maintain blood pressure, cerebral blood flow, and consciousness. When a human stands, about 750 ml of thoracic blood are abruptly translocated downward.