Hemodynamics, meaning literally “blood movement”, is the study of blood flow or the circulation.
All animal cells require oxygen (O2) for the conversion of carbohydrates, fats and proteins into carbon dioxide (CO2), water and energy in a process known as aerobic respiration. The circulatory system functions to transport the blood to deliver O2, nutrients and chemicals to the cells of the body to ensure their health and proper function, and to remove the cell wastes.
Syncope is the medical term for fainting, a sudden, usually temporary, loss of consciousness generally caused by insufficient oxygen in the brain either through cerebral hypoxia or hypotension but possibly for other reasons. Typical symptoms progress through dizziness, clamminess of the skin, a dimming of vision or brownout, possibly tinnitus, complete loss of vision, weakness of limbs to physical collapse. These symptoms falling short of complete collapse, or a fall down, may be referred to as a syncoptic episode.
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