Ukuphelelwa Kokuphela Kwesifo Nokuphefumula Kwegazi Eliphezulu

Eminyakeni edlule enkulumweni, isikhulumi sabuza izinceku "Yikuphi ngempela ukucindezelwa kwegazi eliphezulu?" Udokotela ngamunye ezilalelini wanikeza impendulo ngokuchaza inani lenani lika 140/90 mmHg.

Akekho kuzo izimpendulo ezazifunwa ngumethuli.

Wathi, "Ukucindezeleka komzimba," kusho ukungasebenzi komsebenzi we- endothelium . " Isihluthulelo sokwelapha umfutho wegazi ophezulu, wathi, wayephatha ukuphela komzimba okungapheli.

I-Endothelium

Izitsha zegazi emzimbeni wakho akuzona nje izitsha ezilula lapho igazi ligeleza khona. Ziningi kakhulu. Iqukethe izendlalelo eziningana futhi izinga elingaphakathi ngaphakathi kwesitsha segazi kuthiwa i-endothelium. Cabanga ngalolu ungqimba njengesidolobha ngokwakho. Kukhona okuningi okuqhubekayo. I-endothelium inesibopho sokuthi i-blood clotting kuphela kodwa futhi iyasiza ukulawula ukucindezeleka kwegazi. Ikhiqiza izinto eziningi ezilawula ukuthi isitsha segazi sithinta kanjani noma sinciphisa (sinquma). I-Endothelin yisibonelo somlamuleli wendawo okhiqizwa ngalolu ungqimba olukhuthaza ukuncriction, noma ukunciphisa isitsha segazi. I-nitric oxide ingumlamuli wendawo okhuthaza ukuhlenga izitsha. Esigabeni sokugcina, kukhona impi eqhubekayo eyenzeka phakathi kwezinto ezikhuthaza i-vasoconstriction nalabo abakhuthaza i-vasodilation.

Kucatshangwa ukuthi ukungalingani kule mpi ukuvumela u-vasoconstriction kunomthelela kakhulu ekuthuthukiseni ukucindezelwa kwegazi eliphezulu.

Ezingeni leseli, lokhu kungalingani kungabangela ukucindezeleka okwenyuka kwe-oxidative esitokisini, ukwakheka kwe-oksijeni enobuthi (noma ama-radicals amahhala) okwesikhathi esingaphezu kwesikhathi esingalimaza udonga lwesitsha segazi okwehlisa ukuguquguquka kwawo. Ukungasebenzi kahle kwe-Endothelial kunomthelela ekwakhiweni kwesikhala se-plaque ngaphakathi kodonga lwe-blood vessel.

Izinto Ezingathandeki Ukuphela Kokukhubazeka

Kunezici eziningana ezingavumela ukuthuthukiswa kokungasebenzi kahle kwe-endothelium:

Ukwelapha

Nansi umbono wami ngokuphathelene nalokhu: imithi yokwelashwa, ngenkathi ingancishisa ukucindezelwa kwegazi, ingasebenza kuphela uma une-endothelium engenempilo. Cabanga ngalendlela ngale ndlela: abavimba be-calcium kanye ne-alpha blockers yizigaba zemithi ephumelela ukucindezelwa kwegazi kwegazi ngokusebenza kwi-receptors ethize ezitsheni zegazi ukuze kubangele ukuthuthwa kwegazi. Uma i-endothelium yakho ingenempilo, ucabanga ukuthi le mithi iyoba ngempumelelo kangakanani?

Kunezinto ezithile ongayenza ukuze uthuthukise impilo yemithambo yakho yegazi futhi uphathe umfutho wegazi ophezulu: