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Reflex syncope can occur in otherwise healthy individuals, and has many possible causes, often trivial ones such as prolonged standing with the legs locked. [ citation needed ] The main danger of vasovagal syncope (or dizzy spells from vertigo) is the risk of injury by falling while unconscious.
"pounding in the neck" or neck pulsations, often due to cannon A waves in the jugular vein, pulsations that occur when the right atrium contracts against a closed tricuspid valve. [ 3 ] Palpitation associated with chest pain suggests coronary artery disease , or if the chest pain is relieved by leaning forward, pericardial disease is suspected.
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 ...
Akathisia (IPA: /æ.kə.ˈθɪ.si.ə/) is a movement disorder [5] characterized by a subjective feeling of inner restlessness accompanied by mental distress and/or an inability to sit still. [ 6 ] [ 4 ] Usually, the legs are most prominently affected. [ 2 ]
Rhythmic movement disorder (RMD) is a neurological disorder characterized by repetitive movements of large muscle groups immediately before and during sleep often involving the head and neck. It was independently described first in 1905 by Zappert as jactatio capitis nocturna and by Cruchet as rhythmie du sommeil . [ 1 ]
Brief bouts of exercise or activity throughout the day is recommended to offset the effects of sitting. Prolonged standing may increase the risk of circulatory diseases, such as varicose veins.
Restless leg syndrome is a disorder in which patients feel uncomfortable or unpleasant sensations in the legs. These sensations usually occur in the evening, while the patient is sitting or lying down and relaxing. Patients feel like they have to move their legs to relieve the sensations, and walking generally makes the symptoms disappear.
Gravity will pull the blood back into an individual's legs, ankles and feet. This forces the veins to expand or "balloon" to accommodate this extra blood. The valves of the veins work best in concert with accompanying muscle contractions that force the blood to continue moving up the leg. Standing with some muscles constantly strained weakens ...