Inqununu ye-ejection yindlela oogqirha abalinganisa ngayo ngokuqhelekileyo ukuhlola ukuba intliziyo inako ukupompa igazi. Ngokukodwa, iqhekeza le-ejection liyingxenye yegazi ephoswe kwi-ventricle engasekhohlo (igumbi eliphambili lokupompa intliziyo) ngentliziyo nganye.
Ngokuqhelekileyo, i-ventricle engasekhohlo ikhetha i-55% okanye ngaphezulu kwegazi layo ngokubetha, ngoko-ke "iqhekeza" eliqhelekileyo lingama-55% (0.55) okanye ngaphezulu.
Iqhezu le-ejection ye-40 - 50% ithathwa ngokuba "ngaphantsi kwesiqhelo." Izigulane ezinokuphelelwa yintliziyo kaninzi ziba namaqhekeza ejection angaphantsi kwama-40%.
Isigama se "Ejection Fraction"
Kubalulekile ukuba uqaphele ukuba xa oogqirha bethetha amagama "iqhekeza le-ejection" babhekisela kwiqhezu ejection ye-ventricle ekhohlo. Ngokufanelekileyo oku kuya kuthiwa "iqhekeza le-ejection ye-ventricular" okanye "LVEF" kwaye ngamanye amaxesha uyayibona okanye uyive lesi sigama.
I-ventricle efanelekileyo nayo ineqhezu layo le-ejection ("iqhekeza le-ventricular ejection," okanye i-RVEF). Nangona kunjalo, i-RVEF ayicacisiwe okanye ikhulunywe ngabagqirha (mhlawumbi kuba kunzima kakhulu ukulinganisa i-LVEF, kwaye ngenxa yokuba ukwazi i-RVEF ngokuqhelekileyo akunakuncedo ngokukhethekileyo.)
Xa ugqirha wakho athi "inqununu ye-ejection," ubhekisela kwi-LVEF.
Kutheni Iintliziyo Zengqondo Zizihlandlo Ngezinye Izizathu Zenza I-Ejection Fraction Yehla?
Xa intliziyo yesifo iba buthathaka, iintambo ze-muscle ziyakwazi ukufumana isivumelwano ngokugcwele.
Oko kukuthi, ukunciphisa iintambo ze-muscle ezenzeka ngokuqhekeka kwemizimba kuncipha. Oku kuthetha ukuba, ngaphandle kokuba kukho imbuyekezo yokusebenza kwemisipha embi, inani legazi elipompozwe ngentliziyo nganye ("i- volume stroke ") iya kunciphisa.
Ukuhlawulela le mpazamo, intliziyo iyancipha, ukuvumela ukuba ivolumu yesiqhelo (okanye eqhelekileyo) ihlale igcinwe nangona i-fiber isinciphisa iyancipha.
Oku kuhlenga kuthetha ukuba inani legazi elalikhutshwa ngexesha leentliziyo nganye liyancipha (oko kukuthi, iqhekeza le-ejection liwa) - kodwa ivolumu yomthamo ihlala ihlala kwinqanaba eliqhelekileyo.
Olunye igama lokuhlengahlengiswa kwenhliziyo eyenzekayo ngesifo senhliziyo esishukumisayo "kulungiswa."
I-Fraction ye-Ejection iyalinganiswa njani?
Iqhezu le-ejection lidla ngokulinganiswa kunye ne- echocardiogram , kodwa inokulinganiswa nokukhishwa kwe- MUGA okanye ngexesha lokunyanyiswa komzimba . I-scan ye-MUGA iqhelekileyo yindlela echanekileyo kunye neyokuhlaziywa yokulinganisa iqhekeza le-ejection, kwaye isetyenziswe ngokubanzi kwiimeko apho kulandelwa khona imilinganiselo echanekileyo; Ngokomzekelo, xa i-chemotherapy isetyenziselwa ukuba ibe yityhefu kwisifo senhliziyo - ngokuqhelekileyo, i- doxorubicin (i-Adriamycin) .
Oogqirha basebenzisa njani i-Ejection Fraction Measurement?
Iqhezu le-ejection liwusizo njengomlinganiselo wobungakanani bentliziyo. I-lower fraction ye-fraction ye-ejection, inobuthakathaka intliziyo ye-muscle (ekubeni ukunyuka komzimba kunyanzelekile ukugcina umthamo we-heart stroke). Ukuba inqabana ejection iyawa, oko kuthetha ukuba intliziyo yesisu iyancipha. Iqhekeza elinyukayo le-ejection lithetha ukuba amandla e-muscle aphucula.
Oogqirha basebenzisa i-fraction ye-fraction ye-ejection ukuxilonga i- cardiomyopathy , ukuvavanya ukuphumelela kwonyango lwezokwelapha ekuzinzeni okanye ekuphuculeni ukungaphumeleli kwentliziyo, kunye nokuthatha isigqibo malunga nezindlela ezingcono zonyango zokwahluleka kwentliziyo.
Ngokomzekelo, iqhekeza le-ejection elingaphantsi kwe-35% landisa kakhulu izigulane zesigulana sokuphuhliswa kwentliziyo , kwaye ngokubanzi kufuneka ikhuphe ingxoxo yesikhalazo esicwangcisiweyo.
Imithombo:
Lang RM, Bierig M, Devereux RB, et al. Iingcebiso zengqungquthela yamagumbi: ingxelo evela kwiMidiyoni yase-American Society of Echocardiography yeKomiti yeZikhokelo kunye neZigangatho kunye neQela lokuBhala iCanquantification, eyenziwa ngokubambisana ne-European Association of Echocardiography, isebe le-European Society of Cardiology. J Am Soc Echocardiogr 2005; 18: 1440.