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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 ...
"Aortocaval compression resulting in sudden loss of consciousness and severe bradycardia and hypotension during cesarean section in a patient with subvalvular aortic stenosis". BMC Anesthesiology. 19 (1): 116. doi: 10.1186/s12871-019-0791-x. ISSN 1471-2253. PMC 6610927. PMID 31272377. AJ, Lee; R, Landau (2017).
The diagnosis of heat syncope is done during a physical examination. During the physical exam the practitioner will test the blood pressure of the patient, and the pulse. If the patient is experiencing heat syncope the blood pressure will be low, and the pulse will be elevated. Observation of excess sweating will also be a key sign.
Vasovagal syncope can be considered in two forms: Isolated episodes of loss of consciousness, unheralded by any warning symptoms for more than a few moments. These tend to occur in the adolescent age group and may be associated with fasting, exercise, abdominal straining, or circumstances promoting vaso-dilation (e.g., heat, alcohol).
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.
Inappropriate sinus tachycardia (IST) is defined as sinus tachycardia that is not caused by identifiable medical ailments, a physiological reaction, or pharmaceuticals (a diagnosis of exclusion) and is accompanied by symptoms, frequently invalidating and affecting quality of life. [2]
After welcoming her fourth child in March, Gal Gadot revealed Sunday that during the eighth month of her pregnancy, she was "diagnosed with a massive blood clot in my brain." The "Wonder Woman ...
However, examinations of available case-by-case verbal summaries call into question the conclusion that conditioning episodes are as prevalent as reported. For example, Thyer et al. (1985) identified a conditioning episode when a "patient received an injection at age 13 and fainted", [ 8 ] and in another person when "at age six she heard her ...