Kumvetsetsa momwe magetsi a mtima amagwirira ntchito
Pali zitsulo zinayi zamtima mu mtima wa munthu wathanzi. Ma valve amathandiza kuti magazi aziyenda bwino pamtima , kusunga magazi kuyenda moyenera komanso moyenera, komanso m'njira yoyenera. Kuwonjezera pa ma valve pali zipinda zinayi za mtima - zipinda zam'mwamba zimatchedwa kuti kumanzere ndi kumanja komwe, zipinda zam'munsi ndizomwe zili zotsalira ndi zoyenera.
Mpweya wabwino wamtima umayimitsa magazi kuti asatulukemo kuchokera mu chipinda cha mtima kufikira nthawi yoti mtima uyambe kupopera magazi kumalo omwe akupita. Ma valve amatseguka ndi kutsekedwa ndi nthawi yeniyeni, kulola mtima kupopera mwazi bwino.
Vuvu yomwe imagwira ntchito bwino imayambitsa mtima kugwira ntchito molimbika kuposa momwe iyenera kukhalira, monga magazi amayesera kuyenda molakwika kapena zimakhala zovuta kuti mtima ukhale ndi magazi okwanira. Magazi akhoza "kutuluka" kudzera mu valavu yomwe ilibe ntchito bwino.
Vivuspid Heart Valve
Vivuspid valve ndilo valve yoyamba yomwe magazi amayenderera mkati mwa mtima. Ndi imodzi mwa magetsi awiri a atrioventricular, kutanthauza kuti ili pakati pa atrium ndi ventricle, pakadali pano, kumanja kwa mtima. Zimapangidwa ndi katatu, kapena timapepala timene timagwirira ntchito palimodzi kuti tiyambe ndikuyamba kuyendayenda kwa magazi.
Mapepalawa amamangiriridwa ku minofu ing'onoing'ono, yotchedwa minofu ya papillary, yomwe imalimbikitsa kusamuka kwa timapepala.
Vagu yotchedwa tricuspid valve imatseguka pamene mgwirizano wa atrium, womwe umalola kuti magazi alowe mu ventricle.
Vivus valve, monga mitral valve, ndi imodzi mwa malo omwe amagwiritsidwa ntchito popanga valve ndi kubwezeretsanso, zomwe zingapangitse kuchipatala kukhala kofunikira.
Pulmonic Heart Valve
Vuvu ya pulmonic ndivini yachiwiri ya mtima.
Monga valve ya aortic, imatchulidwanso ngati valve ya semilunar, chifukwa cha mawonekedwe ake. Imakhala pakati pa ventricle yoyenera ndi mitsempha ya pulmonary, yomwe imatenga magazi m'mapapo. Pamene mgwirizano wamagulu oyenera, wotsegula timagetsi timatsegula, kuti magazi alowe m'mapapu.
Mitral Heart Valve
Vali valve, kapena valve valve, ndilo valve lachitatu la mtima. Mofanana ndi valve ya tricuspid, ndi valve atrioventricular, kutanthauza kuti imakhala pakati pa atrium kumanzere ndi ventricle kumanzere. Magazi oxygenati amadutsa mumagetsi a mitral pamene maselo a atrium amavomereza, kuti magazi alowe kuchokera m'chipinda cham'mwamba kupita kumalo otsika pansi.
Mitsempha yotchedwa mitral imapangidwa ndi timapepala timene timapewa kuti magazi asatulukire mu ventricle posachedwa. Pamene maselo a atrium amatha, magetsi amatsegula, kulola kuti magazi alowe mu ventricle.
Mitsempha yotchedwa mitral, monga valve yamagetsi, ndi malo omwe amagwiritsidwa ntchito popangidwanso ndi valve, zomwe zimafuna chithandizo chamankhwala.
Aortic Mtima Valve
Vuvu ya aortic ndi yachinayi ndi yomaliza valve yamtima, ikugona pakati pa ventricle ya kumanzere ndi aorta. Valveyi ili ndi timapepala atatu, timagwirira ntchito pamodzi kuti tiletse magazi kulowa mu aorta msanga.
Vuvu ya aortic imatsegula pamene mgwirizano wa ventricle, kulola magazi kuchoka pamtima ndikuyamba ulendo wopita ku thupi lonse.
Mavuto a Vhulo la Mtima
Ngakhale kuti ma valve ena amakhala ovuta kuposa ena kuti adziwe matenda enieni a valvular, ma valve onse akhoza kukhala ndi mavuto. Nthawi zina, vuto la valve silikhala ndi zizindikiro ndipo limangowonekera chifukwa cha mtima ukudandaula. Mavuto ena, monga kubwezeretsedwa, angapereke zizindikiro monga kupuma pang'ono kapena mtima umene ukugwira ntchito molimbika.
Ngati vutoli likhoza kukhala lalikulu, mayesero angapangidwe kuti adziwe ngati opaleshoni yokonza opaleshoni kapena opaleshoni yowonjezeretsa valve iyenera kuganiziridwa.
Zotsatira:
> Valves yamtima. American Heart Association.