Ischemia

Ischemia
: Inadequate blood supply (circulation) to a local area due to blockage of the blood vessels to the area.
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Local anemia due to mechanical obstruction (mainly arterial narrowing or disruption) of the blood supply. [G. ischo, to keep back, + haima, blood]
- myocardial i. inadequate circulation of blood to the myocardium, usually as a result of coronary artery disease. SEE ALSO: angina pectoris, myocardial infarction.
- postural i. the reduced blood pressure and flow induced in a part, e.g., the leg or foot, by raising it above the heart level; used to reduce bleeding during surgical operations on the extremities.
- i. retinae diminished blood supply in the retina due to failure of the arterial circulation; it may occur as a result of arterial embolism or spasm; poisoning, as by quinine; or exsanguination from recurring profuse hemorrhages; bilateral transitory or permanent blindness may result.
- silent i. myocardial i. without accompanying signs or symptoms of angina pectoris; can be detected by ECG and other lab techniques. SEE ALSO: silent myocardial infarction.

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isch·emia or chiefly Brit isch·ae·mia is-'kē-mē-ə n deficient supply of blood to a body part (as the heart or brain) that is due to obstruction of the inflow of arterial blood (as by the narrowing of arteries by spasm or disease)
isch·emic or chiefly Brit isch·ae·mic -mik adj
isch·emi·cal·ly or chiefly Brit isch·ae·mi·cal·ly -mi-k(ə-)lē adv

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is·che·mia (is-keґme-ə) [isch- + emia] deficiency of blood in a part, usually due to functional constriction or actual obstruction of a blood vessel. ischemic adj

Medical dictionary. 2011.

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Look at other dictionaries:

  • ischemia — ischemiá vb., ind. prez. 3 sg. ischemiáză Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic …   Dicționar Român

  • ischemia — [is kē′mē ə] n. [ModL < Gr ischaimos, stanching blood (< ischein, to hold + haima, blood: see SCHEME & HEMO ) + IA] a lack of blood supply in an organ or tissue ischemic adj …   English World dictionary

  • Ischemia — Vascular ischemia of the toes with characteristic cyanosis. In medicine, ischemia (from Greek ισχαιμία, ischaimía; isch root denoting a restriction or thinning or to make or grow thin/lean, haema blood) is a restriction in blood supply, generally …   Wikipedia

  • ischemia — noun Etymology: New Latin ischaemia, from ischaemus styptic, from Greek ischaimos, from ischein to restrain (akin to Greek echein to hold) + haima blood more at scheme Date: 1855 deficient supply of blood to a body part (as the heart or brain)… …   New Collegiate Dictionary

  • Ischemia — Ischémie Une ischémie est la diminution de l apport sanguin artériel à un organe. Cette diminution entraîne essentiellement une baisse de l oxygénation des tissus de l organe en dessous de ses besoins (hypoxie), et la perturbation, voire l arrêt… …   Wikipédia en Français

  • ischemia — ischemic /i skee mik, skem ik/, adj. /i skee mee euh/, n. Pathol. local deficiency of blood supply produced by vasoconstriction or local obstacles to the arterial flow. Also, ischaemia. [1855 60; < Gk ísch(ein) to suppress, check + EMIA] * * * …   Universalium

  • ischemia — noun Local disturbance in blood circulation due to mechanical obstruction of the blood supply (vasoconstriction, thrombosis or embolism) …   Wiktionary

  • ischemia — i·sche·mì·a s.f. TS med. marcata diminuzione del normale afflusso di sangue in una parte dell organismo, che si verifica per abbassamento della pressione arteriosa o per riduzione del lume arterioso {{line}} {{/line}} DATA: 1833. ETIMO: comp. di… …   Dizionario italiano

  • ischemia — {{hw}}{{ischemia}}{{/hw}}s. f. (med.) Diminuzione o soppressione della circolazione sanguigna in una parte dell organismo …   Enciclopedia di italiano

  • ischemia — pl.f. ischemie …   Dizionario dei sinonimi e contrari

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