Senhliziyo conduction uhlelo: isakhiwo, umsebenzi kanye nezici yokwakheka bokuphila

Kuvele isici esibalulekile umsebenzi we imisipha yenhliziyo kuyinto automatism entengo. esihlelwe kahle umsebenzi inhliziyo, ogxile ukusikwa ezilandelanayo nokungcebeleka of nezicubu imisipha ye Atria futhi ventricles, eqhuba ezinzwa amaza kulawulwa isakhiwo yeselula ne eyinkimbinkimbi.

Uhlelo conductive wenhliziyo - indlela ebalulekile ukuqinisekisa ukusebenza Umzimba womuntu, ehlanganisa generator ishayela (pacemaker) nendlela umuntu eziyinkimbinkimbi senzelwe innervation infarction imijikelezo. Ehlanganisa isakhiwo yeselula, kusekelwe umsebenzi P-amaseli ne-T-amaseli, kuhloswe ukuqalisa futhi iqondise ukusikwa inhliziyo emakamelweni inhliziyo. Uhlobo lokuqala amaseli has imisebenzi ebalulekile bokuphila we automaton - sinekhono Kufinyeta Rhythmic ngaphandle uxhumano express nethonya iyiphi ezintweni ezenzeka ngaphandle.

T cell, esikhundleni salokho, abe contractile ngiyibona yokudlulisela amandla elakhiwe P-cells ukuze myocardium, iqinisekisa ukusebenza elingenazinkinga. Ngakho, uhlelo nokuqhuba inhliziyo, okuyinto esekelwe physiology nokuxhumana abushelelezi kwala maqembu amabili amaseli, kuyinto indlela eyodwa lomzimba ikhipha kufakwe iyunithi inhliziyo.

Ukuqhuba somuntu sokujikeleza inhliziyo siqukethe izingxenye eziningana obusebenzayo: engeyokuqala sinoatrial kanye atrioventricular futhi besigaxa block legatsha ngakwesokudla bese ngakwesokunxele imilenze, ephela ngo Purkinje zesivikelo sesifuba. Sinoatrial (itheku) node ise ATRIUM kwesokudla, kuyinto mass elincane imisipha Imicu yotshani ukuma okweqanda. Kuyinto kule ingxenye, oqala ngokuthi uhlelo nokuqhuba inhliziyo, eziqala ezinzwa amaza, okubangela izimpendulo contractile ngayo yonke inhliziyo yami. Automata evamile node sinoatrial ubhekwa kusukela pulses ngomzuzu amahlanu ayisishiyagalombili.

isakhi Atrioventricular elise ngezansi endocardium ingxenye posterior we septum interatrial, umsebenzi obalulekile ukubambezeleka, ukuhlunga kanye ukuhanjiswa pulses engenayo ekhiqizwa futhi ithunyelwe kwa-engeyokuqala sinoatrial. Senhliziyo conduction uhlelo futhi wenza imisebenzi zokulawula kanye wokusakaza ewunikwe isakhi kwesakhiwo - engeyokuqala atrioventricular.

Isidingo umsebenzi onjalo ngenxa yokuthi igagasi emsipheni amaza, kweso lisabalalele uhlelo Atria futhi okubangela impendulo yabo contractile impendulo ngokushesha ukungena ventricles wenhliziyo akakwazi, ngoba myocardium atrial we ventricles uhlukane izicubu lunemicu ungaphuthelwa amaza emsipheni. Futhi kuphela esifundeni engeyokuqala atrioventricular ngakho akukho isithiyo zingangentaba. Lokhu kubangela amagagasi ishayela befuna indlela ukubabela le ngxenye ebalulekile, lapho kukhona ukusatshalaliswa yabo iyunifomu kulo iyunithi inhliziyo.

Senhliziyo conduction uhlelo iqukethe e oyiyo a block legatsha lenqwaba, ngibopha atrial futhi ventricular myocardium, futhi Purkinje endwangwini, akha synapse ku kardiomiotsitarnyh amaseli bese ukunikeza interfacing ledzingekako imisipha futhi injabulo kwemizwa. Enkabeni yalo, idatha fibre okugcina block amagatsha besigaxa legatsha, exhunywe plexus subendocardial we ventricles zenhliziyo.