Fungulo la ejection ndi madokotala omwe amawagwiritsa ntchito kuti aone momwe mtima umatha kupopera magazi. Kwenikweni, kachigawo kakang'ono ka ejection ndi chiwerengero cha magazi omwe amaponyedwa kuchokera kumanzere kumanzereko (chipinda chachikulu chothamanga cha mtima) ndi kumenya mtima kulikonse.
Kawirikawiri, ventricle ya kumanzere imamwa 55% kapena kuposerapo kwa magazi ake pamtunda uliwonse, choncho kachigawo kakang'ono ka ejection ndi 55% (0.55) kapena apamwamba.
Gawo la ejection la 40 - 50% limatengedwa "pansipa mwachibadwa." Odwala omwe ali ndi vuto la mtima nthawi zambiri amakhala ndi tizigawo ting'onoting'ono ta ejection omwe ali osachepera 40%.
Mawu omaliza a "Ejection Fraction"
Ndikofunika kuzindikira kuti pamene madokotala amati "kachigawo kakang'ono ka ejection" iwo akutanthauza kachigawo kakang'ono ka tizilombo tanzere. Zowonjezereka izi zikanatchedwa "gawo lamanjenje lachitsulo" kapena "LVEF" ndipo nthawi zina mumatha kumva kapena kumva mawu awa.
Ventiriyumu yolondola ili ndi kachigawo kake ka ejection ("gawo labwino la ventricular ejection," kapena RVEF). Komabe, a RVEF samatchulidwa kapena kutchulidwa kawirikawiri ndi madokotala (chifukwa chakuti ndi zovuta kwambiri kuyeza kuposa LVEF, ndipo chifukwa chakuti kudziwa RVEF yeniyeni sikofunika kwenikweni.)
Dokotala wanu atanena "kachigawo ka ejection," iye akutanthauza LVEF.
Nchifukwa chiyani Matenda a Mtima Nthawizina Amapangitsa Mzere Wochepa Wosakaniza?
Pamene minofu yamtima imakhala yofooka, minofu ya minofu imalephera kugwira ntchito mwathunthu.
Izi ndizakuti kuchepetsedwa kwa mitsempha ya minofu yomwe imapezeka ndi minofu yotsitsika imachepetsedwa. Izi zikutanthauza kuti, pokhapokha ngati pali malipiro a minofu yosauka, kuchuluka kwa magazi kuponyedwa ndi mtima uliwonse (" mphamvu ya" stroke ") kungachepetse.
Pofuna kuthetsa vutoli, mtima umasokonekera, kuti vutolo lachibadwa (kapena lapafupi) likhale losungidwa ngakhale kuti kuchepa kwa minofu kumachepetsa.
Kusuntha uku kumatanthauza kuti kuchuluka kwa magazi komwe kumatayidwa pa chifuwa chilichonse cha mtima kumachepetsedwa (ndiko kuti, kachigawo kakang'ono kamene kakagwa) - koma mphamvu ya stroke imakhalabe pafupipafupi.
Dzina lina la kubwezeretsa mtima kwa mtima kumene kumachitika ndi matenda a minofu ya mtima "kumakonzanso."
Kodi Fraction Ejection Imayesedwa Bwanji?
Gawo la ejection limayesedwa kawirikawiri ndi echocardiogram , koma ikhozanso kuyesedwa ndi kuyesa kwa MUGA kapena pa catheterization ya mtima . Kuyeza kwa MUGA kawirikawiri ndi njira yolondola komanso yobwezeretseratu yoyeza kachigawo kakang'ono ka ejection, ndipo kawirikawiri imagwiritsidwa ntchito pa nthawi yomwe zimayesedwa, zowonongeka; Mwachitsanzo, pamene chemotherapy ikugwiritsidwa ntchito yomwe ikhoza kukhala poizoni kwa minofu ya mtima - kawirikawiri, doxorubicin (Adriamycin) .
Madokotala Amagwiritsira Ntchito Bwanji Mzere Wopangira Mphungu?
Gawo la ejection limapindulitsa ngati muyeso wa mphamvu yonse ya mtima. Pansipansi gawo la ejection, lofooka mtima wa minofu (popeza kuti kupitirira mtima kwa mtima kukufunika kuti mukhale ndi mtima wosasinthasintha). Ngati kachigawo ka ejection kakagwera, kamene kamatanthauza kuti minofu ya mtima ikufooka. Chigawo chowonjezeka cha ejection nthawi zambiri chimatanthauza mphamvu ya minofu ya mtima ikukula.
Madokotala amagwiritsira ntchito kachigawo kakang'ono ka ejection kuti apeze matenda a mtima , kuti aone momwe ntchito yachipatala imathandizira kuti zikhazikitse kapena kuchepetsa kufooketsa mtima, ndi kusankha njira zabwino zothandizira kuperewera kwa mtima.
Mwachitsanzo, kachigawo kakang'ono kosapitirira 35% kowonjezera kwambiri chiwerengero cha m "modzi wa kumangidwa kwa mtima , ndipo kawirikawiri ayenera kukwiyitsa zokambirana za munthu yemwe ali ndi kachilombo koyambitsa matenda.
Zotsatira:
Lang RM, Bierig M, Devereux RB, et al. Malingaliro a chipinda chokhazikitsira chipinda: lipoti lochokera ku Komiti ya American Society of Echocardiography's Guidelines and Standards Committee komanso bungwe la Chamber Quantification Writing, lomwe likugwirizanitsidwa ndi European Association of Echocardiography, nthambi ya European Society of Cardiology. J Am Soc Echocardiogr 2005; 18: 1440.