Initial Orthostatic Hypotension in the Young Is Attenuated by Static Handgrip
نویسندگان
چکیده
منابع مشابه
Initial orthostatic hypotension is unrelated to orthostatic tolerance in healthy young subjects.
The physiological challenge of standing upright is evidenced by temporary symptoms of light-headedness, dizziness, and nausea. It is not known, however, if initial orthostatic hypotension (IOH) and related symptoms associated with standing are related to the occurrence of syncope. Since IOH reflects immediate and temporary adjustments compared with the sustained adjustments during orthostatic s...
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A 29-year-old white woman (weight, 1211b; height, 5 ft 6 in.) was referred to the Hypertension Unit of Massachusetts General Hospital in December 1984. She had been athletic and apparently in excellent health until September 1979 when she contracted an upper respiratory tract infection associated with wheezing. She was treated with prednisone for 5 days with resolution of the symptoms but later...
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Several studies have shown that standing up is a frequent (3-10%) trigger of loss of consciousness both in young and old subjects. An exaggerated transient BP (blood pressure) fall upon standing is the underlying cause. IOH (initial orthostatic hypotension) is defined as a transient BP decrease within 15 s after standing, >40 mmHg SBP (systolic BP) and/or >20 mmHg DBP (diastolic BP) with sympto...
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n engl j med 358;6 www.nejm.org february 7, 2008 615 A 65-year-old man reports a 6-month history of dizziness, light-headedness, weakness, and fatigue while upright. He takes no medication and has no personal or family history of neurologic disease. On physical examination, his supine blood pressure is 160/100 mm Hg, with a heart rate of 72 beats per minute; on standing, his blood pressure fall...
متن کاملOrthostatic hypotension in aging humans.
We tested the hypothesis that hypotension occurred in older adults at the onset of orthostatic challenge as a result of vagal dysfunction. Responses of heart rate (HR) and mean arterial pressure (MAP) were compared between 10 healthy older and younger adults during onset and sustained lower body negative pressure (LBNP). A younger group was also assessed after blockade of the parasympathetic ne...
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ژورنال
عنوان ژورنال: The Journal of Pediatrics
سال: 2010
ISSN: 0022-3476
DOI: 10.1016/j.jpeds.2010.01.035