Chikamu chiduku chinonzi chiremba chinowanzoshandiswa kuongorora kuti mwoyo unokwanisa sei kudurura ropa. Kunyanya, chikamu cheejection chikamu cheropa iro rinoputirwa kubva kuruboshwe rwemhepo (iyo huru yekuputira mukamuri yemwoyo) nemoyo wese wakarohwa.
Kazhinji, chinonzi ventricle chiri kuruboshwe chinodarika 55% kana kupfuura yehutachiona yaro neropa rimwe nerimwe, saka chikamu che "ejwayelekile" ejection chikamu chikamu 55% (0.55) kana kupfuura.
Chikamu chinokonzera ejection che40 - 50% chinoonekwa se "pasi pemazuva ose." Varwere vane kukanganisa kwemwoyo kazhinji vanove nezvikamu zviduku zvakasara zvisingasviki 40%.
Terminology ye "Ejection Fraction"
Zvakakosha kucherechedza kuti kana vanachiremba vanoti mazwi e "fraction ejection" ivo vari kureva chikamu cheejection chekusiya ventricle. Zvakanyatsonaka izvi zvingazonzi "chikamu chekusimba chinonzi ventricular ejection" kana kuti "LVEF" uye dzimwe nguva ungaona kana kunzwa izwi iri.
Izvo ventricle yakarurama inewo chikamu chayo ejection (iyo "right ventricular ejection fraction," kana RVEF). Zvisinei, RVEF haitauri kana kuti inotaurwa nezvachiremba (zvichida nokuti zvakaoma kuverenga kupfuura LVEF, uye zvimwe nokuti kuziva RVEF chaiyo hakuwanzobatsiri.)
Apo chiremba wako anotaura "chikamu chakakosha," iye ari kutaura nezveLVEF.
Nei Chirwere Chepfungwa Zvimwe Zvimwe Zvichiita Kuti Kuderedzwa Ejection Fraction?
Apo mushumo wemwoyo unova usina simba, mishonga yemisumbu haigoni kubvumirana nekuzara.
Izvi zvinoreva kuti kupfupisa kwemishupa yemasumbu inowanikwa nemisungo inoputika inopera. Izvi zvinoreva kuti, kunze kwekuti paine mubhadharo wevarombo vemaviri, basa reropa rakaputirwa nemoyo wese (" stroke volume ") inoderedza.
Kuti abatsire kukanganisa uku, mwoyo unoderera, uchibvumira kuti zvive zvakakwana (kana kuti zvisiri-zvakasikwa) chirwere chepuroke inofanira kuchengetedzwa pasinei kuderedzwa kwemasuru fiber kuderedza.
Izvi zvinoreva kuti uwandu weropa huri kubudiswa panguva yekubata kwemwoyo kunoderedzwa (kureva kuti, chikamu chinoputika chinowira) - asi sitiroko yevhesi inowedzera kuramba iri munharaunda inowanikwa.
Imwe zita rekudzikinura kwepfungwa kunokonzerwa nehutachiona hwepfungwa " kunogadzirisa ."
Ko Ejection Fraction Inoenzaniswa Sei?
Chikamu cheejection chinonyanya kuyerwa ne echocardiogram , asi chinogona kuyerwa ne MUGA scan kana munguva yekushaya catheterization . Iko MUGA kuongorora ndiyo inowanzo yakarurama uye inogadziriswa nzira yekuyera chikamu che ejection, uye inowanzoshandiswa mumamiriro ezvinhu apo inodzokorora, zviyero zvakajeka zvinodiwa; somuenzaniso, apo chemotherapy iri kushandiswa iyo inogona kuva inotyisa kumutsipa wemwoyo - kazhinji, doxorubicin (Adriamycin) .
Vanachiremba Vanoshandisa Sei Majekiseni Ejection?
Chikamu che ejection chinobatsira sechiyero chemasimba ose emoyo. Icho chiri pasi chikamu che ejection, icho chinenge chisina simba mwoyo wemusumbu (sezvo mamwe kuwedzera kwemwoyo kunodiwa kuti uchengetedze chirwere chepfungwa mukati). Kana chikamu che ejection chiri kudonha, izvo zvinowanzoreva kuti mutsara wemwoyo uri kushaya simba. Chikamu chinoramba chichiwedzera ejection chinowanzoreva moyo wemasimba musimba uri kuwedzera.
Vanachiremba vanoshandisa chikamu cheejection kuti vaongorore chirwere chemoyo , kuongorora kubudirira kwehutano hwehutano mukugadzirisa kana kuvandudza kukanganisa kwemwoyo, uye kugadzirisa pamusoro penzira dzakanakisisa dzokurapa kwekushaya kwemoyo.
Semuenzaniso, chikamu chiduku chinodarika 35% chinowedzera kukanganisa kwemurwere wekusimudzirwa kwemwoyo , uye kazhinji anofanira kumutsa hurukuro yezvinoshandiswa zvinogadziriswa.
Sources:
Lang RM, Bierig M, Devereux RB, et al. Zvinyorwa zvekambiso yekamuri: mushumo unobva kuAmerican Society of Echocardiography's Guidelines and Standards Committee uye Group Quitational Writing, yakagadzirwa pamwe neEuropean Association of Echocardiography, bazi reEuropean Society of Cardiology. J Am Soc Echocardiogr 2005; 18: 1440.