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Episodes of vasovagal syncope are typically recurrent and usually occur when the predisposed person is exposed to a specific trigger. Before losing consciousness, the individual frequently experiences early signs or symptoms such as lightheadedness, nausea, the feeling of being extremely hot or cold (accompanied by sweating), ringing in the ears, an uncomfortable feeling in the heart, fuzzy ...
Acute (short-term) low blood sugar symptoms are best treated by consuming small amounts of sweet foods, so as to regain balance in the body's carbohydrate metabolism. Suggestions include sugary foods that are quickly digested, such as: Dried fruit; Soft drinks; Juice; Sugar as sweets, tablets or cubes. [25]
Some psychological conditions (anxiety disorder, somatic symptom disorder, conversion disorder) may cause symptoms resembling syncope. [9] A number of psychological interventions are available. [29] Low blood sugar can be a rare cause of syncope. [30] Narcolepsy may present with sudden loss of consciousness similar to syncope. [9]
After describing the known mechanisms of blood glucose regulation, the authors call for more research: The body's normal response to carbohydrate ingestion includes elaboration of an as yet unidentified hormonal (gut) factor from the upper intestine. They say that a glucose tolerance test is appropriate but caution that:
Lightheadedness is very similar to pre-syncope. Pre-syncope is the immediate stage before syncope (fainting), particularly in cases of temporary visual field loss (i.e. vision getting "dark" or "closing in"). [2]
The vagovagal reflex is active during the receptive relaxation of the stomach in response to swallowing of food (prior to it reaching the stomach). When food enters the stomach a "vagovagal" reflex goes from the stomach to the brain, and then back again to the stomach causing active relaxation of the smooth muscle in the stomach wall.
Syncope rapidly ensues. Indeed, the short latency between the stimulus and the attack has been emphasized as an important distinction from the more familiar (at least in older children and adults) vasovagal syncope. The child loses awareness and postural tone, falling to the ground. There may be down-beat nystagmus.
Symptoms of diabetic hypoglycemia, when they occur, are those of hypoglycemia: neuroglycopenic, adrenergic (that is, activating adrenergic receptors, resulting e.g. in fast heartbeat), and abdominal. Symptoms and effects can be mild, moderate or severe, depending on how low the glucose falls and a variety of other factors.