Pressure, low blood

Pressure, low blood
Any blood pressure that is below the normal expected for an individual in a given environment. Low blood pressure is also referred to as hypotension. Low blood pressure is a relative term because the blood pressure normally varies greatly with activity, age, medications, and underlying medical conditions. Low blood pressure can result from conditions of the nervous system, conditions that do not begin in the nervous system, and drugs. Neurologic conditions that can lead to low blood pressure include changing position from lying to more vertical (postural hypotension), stroke, shock, lightheadedness after urinating or defecating, Parkinson’s disease, neuropathy and simply fright. Nonneurologic conditions that can cause low blood pressure include bleeding, infections, dehydration, heart disease, adrenal insufficiency, pregnancy, prolonged bed rest, poisoning, toxic shock syndrome, and blood transfusion reactions. Hypotensive drugs include blood pressure drugs, diuretics (water pills), heart medications (especially calcium antagonists-nifedipine/PROCARDIA, beta blockers-propranolol/INDERAL and others), depression medications (such as amitriptyline/ELAVIL), and alcohol.

Medical dictionary. 2011.

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Look at other dictionaries:

  • low blood pressure — n. HYPOTENSION …   English World dictionary

  • low blood pressure — low′ blood′ pres sure n. pat hypotension • Etymology: 1920–25 …   From formal English to slang

  • Low blood pressure — Any blood pressure that is below the normal expected for an individual in a given environment. Low blood pressure is also referred to as hypotension. Low blood pressure is a relative term because the blood pressure normally varies greatly with… …   Medical dictionary

  • Blood pressure, low — Any blood pressure that is below the normal expected for an individual in a given environment. Low blood pressure is also referred to as hypotension. Low blood pressure is a relative term because the blood pressure normally varies greatly with… …   Medical dictionary

  • low blood pressure — noun : hypotension * * * hypotension. [1920 25] * * * low blood pressure, = hypotension. (Cf. ↑hypotension) …   Useful english dictionary

  • low blood pressure — blood pressure that is below the normal level …   English contemporary dictionary

  • Low blood pressure cascade — When blood pressure falls many physiological cascades commence in order to return the blood pressure to a more appropriate level. # The blood pressure fall is detected by a decrease in blood flow and thus a decrease in GFR. # Decrease in GFR is… …   Wikipedia

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  • pressure — pressureless, adj. /presh euhr/, n., v., pressured, pressuring. n. 1. the exertion of force upon a surface by an object, fluid, etc., in contact with it: the pressure of earth against a wall. 2. Physics. force per unit area. Symbol: P Cf. stress… …   Universalium

  • low blood pressure — noun Date: 1924 hypotension …   New Collegiate Dictionary

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