Mtima dongosolo conduction: kapangidwe, ntchito ndi mbali anatomical ndi thupi

An khalidwe yofunika ya ntchito za minofu mtima ndi automatism kuchepetsedwa. Bwino mgwirizano ntchito za mtima, ozikidwa pa chidule yotsatana ndi zosangalatsa za minofu minofu ya atria ndi ventricles, kuchititsa zikhumbo mitsempha malamulo ndi eg ma ndi dongosolo zovuta.

dongosolo A conductive za mtima - ndi njira zofunika kuonetsetsa kugwira ntchito kwa thupi la munthu, wopangidwa mwa zimachitika jenereta (pacemaker) ndipo munthu formations zovuta anafuna kuti m'zinthu innervation infarction. Wopangidwa mwa dongosolo ma, ozikidwa pa ntchito P-maselo ndi T-maselo, chinali cholinga kuti ayambitse ndi ntchito mtima chidule cha zipinda mtima. Yoyamba ya maselo ali ntchito zofunika zokhudza thupi la automaton - luso contractions rhythmic popanda ubale yachangu ndi chikoka cha zikuchitika kwina.

maselo T nawonso, ndi contractile mopupuluma kufala mphamvu kwaiye P-maselo myocardium, amene amaonetsetsa vuto lililonse ntchito. Choncho, dongosolo kuchititsa maphunziro a mtima, ozikidwa pa Maphunziro Akakhalidwe Kazolengedwa wa mogwirizana yosalala ya magulu awiriwa maselo, ndi umodzi kwachilengedwenso limagwirira ndi amapanga m'gulu unit mtima.

Kuchititsa anthu dongosolo mtima tichipeza zigawo zingapo zinchito: ndi mfundo sinoatrial ndi atrioventricular ndi mtolo chipika nthambi kumanja ndi kumanzere miyendo, kutsiriza mu Purkinje ulusi. Sinoatrial (nkusani) mfundo ili mu atrium lamanja, ndi misa ka ulusi minofu elliptical mawonekedwe. Ndi ku chigawo ichi, limene limayamba ndi dongosolo kuchititsa maphunziro a mtima, amayambira zikhumbo mitsempha, kuchititsa mayankho contractile ndi mtima wanga wonse. Automata yachibadwa mfundo sinoatrial imatengedwa kwa nyemba makumi asanu ndi eyite pa mphindi.

Atrioventricular chigawo ili pansipa endocardium mu zapambuyo gawo la septum interatrial, ndi ntchito yofunika kwambiri ya yomweyo, zosefera ndi kusokonekera kwa nyemba ukubwera kwaiye ndipo anatumizidwa ku mfundo sinoatrial. Mtima conduction dongosolo komanso amagwira ntchito zolimbana ndi distributive anatumizidwa kuti chigawo chimodzi structural - ndi mfundo atrioventricular.

Kufunika kwa ntchito yotero chifukwa chakuti yoweyula kwa zikhumbo za mitsempha, nthawi yomweyo kufalitsa mwa dongosolo atria ndi kuchititsa kubvomereza kwawo contractile ayankhe pomwepo kudutsa mu ventricles za mtima sangathe, chifukwa myocardium matenda a ventricles ndi wosiyana minofu fibrous, musaphonye zilakolako mitsempha. Ndipo okha m'chigawo cha mfundo atrioventricular choncho palibe chotchinga akuluakulu. Izi zimapangitsa adzionere yoweyula pofunafuna njira wofuna chigawo yofunika imeneyi, kumene yogawa awo yunifolomu lonse unit mtima.

Mtima conduction dongosolo mulinso mu dongosolo ake mtolo nthambi chipika, kumanga matenda ndi yamitsempha yamagazi myocardium, ndi Purkinje ulusi, limene synapses pa maselo kardiomiotsitarnyh ndi kupereka interfacing zofunika minofu chidule ndi chisangalalo mantha. Pakati pake penipeni, CHIKWANGWANI deta omaliza nthambi mtolo nthambi chipika, Ufumuyo kwa plexus subendocardial wa ventricles za mtima.