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ISHEMIYA

ishemiaISHEMIYA (Ischaemia; yun. ischo – nigoh doshtan va haima – khun), kamkhunii juzi, bo khun kam tamin gashtani uzvu bofta binobar qat yo kam shudani harakati khuni arteriyavi dar qitai muayyani organizm.
I. se khel – angiospazmi, sidodi (basta budan) va fishori meshavad. I.-i angiospazmi zeri tasiri angezandahoi gunogun, ki boisi tashannuji refleksii ragho megardand, inkishof meyobad. Sababi I.-i sidodi bisyor vaqt bo sudda (tromb) basta shudani rag yo bemorihoi iltihobii devorai ragho meboshand; dar natija surokhi rag tang va harakati khun dushvor meshavad. I.-i fishori dar mavridi ba rag tazyiq ovardan (mas., bo jgut, fishori omos, khadsha, tarashshuhot, jismi begona) ba vujud meoyad. Bisyor vaqt shaklhoi gunoguni I. yakjoya rukh menamoyand.
Hangomi I. tagziyai devorai ragho, bofta yo uzv khalal yofta, onho bo oksigen tamin nameshavand; dar kori mubodilai moddaho va faoliyati uzv nosomoni ba mushohida merasad (nig. Gipoksiya). Dar asnoi I.-i bardavom mumkin ast nekroz ba vuqu payvandad, saktai uzv rukh dihad.
Farjomi I. ba mahalli paydoish, davomot, darajai ustuvorii bofta ba kohishi oksigen va g. vobasta ast. Hususan I.-i magzi sar va dil oqibati vaznin ba bor meorad.

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