Nidaamka Wadnaha tabinta: Qaabkadhismeedka, shaqo iyo qaababka jidh iyo nafeedba

dabeecad u muhiim ah oo shaqada ee muruqa wadnaha waa yareynta automatism. Well isku duba shaqada wadnaha, kaas oo ku salaysan foosha isku xig xiga iyo nasashada ee unugyada muruqa ah atria iyo intraventricular, qabashada falalkooda dareemeyaasha nidaam qaab gacanta qaab adag.

Nidaamka A tabinta waxyaalaha qalbiga ku jira - hab muhiim ah si loo hubiyo wanaaga ee u shaqeeyo aadanaha, oo ka kooban a matoor garaaca wadnaha (pacemaker) iyo qaababka shaqsi adag loogu tala galay wareegyada Wadnaxanuun innervation. Oo ka kooban dhisme gacanta, kaas oo ku salaysan shaqada P-unugyada iyo T-unugyada, waxaa loogu tala galay in la bilaabo oo agaasin foosha wadnaha, qolladihii qalbiga ku jira. Nooca ugu horeeya waxa unugyada leeyahay hawlaha muhiimka ah nafsaaniga ah ee automaton ah - awood u ah foosha jiibta oo aan wax xiriir ah express saamaynta kasta oo ku meersan dibadda.

unugyada T, markeeda, waxay leeyihiin awood gudbinta Suu contractile ah ahbaa P-unugyada in myocardium ah, taas oo ay hubisaa in howlgal dhib-free. Sayidka, nidaamka qaban of wadnaha, kaas oo ku salaysan jirka ah ee dhexgalka ah oo siman oo ka mid ah laba kooxood oo ka mid ah unugyada, waa hab hal noolaha waa qaab ka mid ah qaybta wadnaha.

Samaynta nidaamka wadnaha aadanaha ka kooban dhowr qaybood functional: Guntin ku sinoatrial iyo atrioventricular iyo block laan xidhmo on midig iyo bidix lugaha, dhamaadeen fiiloyin Purkinje. Sinoatrial (sanka) Guntin ku yaala Atrium saxda ah, waa tiro yar oo ah macdantaa muruqa qaab elliptical. Waa in this qayb, taas oo ka bilaabanayso nidaamka qaban waxyaalaha qalbiga ku jira ka, dhab ahaan falalkooda dareemayaasha, keenaya jawaabaha contractile qalbigayga oo dhan. Automata Guntin sinoatrial caadiga ah waxaa loo arkaa inay ka konton in siddeetan karsado halkii daqiiqo.

qayb Atrioventricular hoos endocardium ah oo ku yaalla qeybta dambe ee septum ku interatrial, shaqo muhiim ah oo dib u dhac, shaandhaynta iyo qeybiyey ee la karsado socda ahbaa iyo diray inay Guntin ku sinoatrial ah. nidaamka tabinta Wadnaha kale ee uu qabtaa hawlaha wax go'aamiya iyo furfurista loo xilsaaray in ay qayb ka dhismaha - Guntin ku atrioventricular.

Baahida loo qabo shaqo noocan oo kale ah ay sabab u tahay xaqiiqda ah in la ruxruxo ee falalkooda dareemayaasha, isla faafo iyada oo loo marayo nidaamka atria iyo keenaya jawaabta contractile jawaabta ay isla markiiba dhex gelin u geliyey intraventricular waxyaalaha qalbiga ku jira ma awoodo inuu, maxaa yeelay, myocardium ah wadne-of intraventricular ka nudaha buunshada ku kala soocay, ma seegi falalkooda dareemaha. Oo kaliya ee gobolka of Guntin ku atrioventricular sidaas darteed ma jiro kala ooday gudbi karin. Taasina waxay keentaa in la ruxruxo garaaca wadnaha oo raadinaya hab ay u furan tahay in uu qayb ka this muhiim ah, halkaas oo ay jiraan ay qaybinta direyska oo dhan unugga wadnaha ah.

nidaamka tabinta Wadnaha kale oo ku jira in ay qaab-dhismeedka a laan block xidhmo, ku qabanaya xogleh iyo myocardium ventricular, iyo Purkinje fiiloyin, taas oo samaysa synapses on unugyada kardiomiotsitarnyh iyo siiyaan interfacing lagama maarmaanka ah ee foosha muruqa iyo reyn dareemayaasha. At ay asaasiga ah, xogta fiber yihiin block ee laanta xidhmo branching final, ku lifaaqan plexus ku subendocardial ah intraventricular qalbiga ku.