Automaticity qalbiga aadanaha: qeexidda, sharaxaad, unugyo iyo Wehliyaha

automaticity Wadnaha ka dhigan jirka foosha jiibta hoos tallaabo ee la karsado dhaca dhexdeeda oo aan ku meersan-celin ka baxsan ka. Automaticity waa soo jireenka ah ee jirka ku jira oo dhan iyo qeybo ka mid ah, laakiin aan muruqa wadnaha. Waxaa jira caddaymo of this ifafaale - jidhka jiibta xayawaanka iyo bini'aadanka oo jeexan, go'doon ka wax walba oo dusha sameeyey ee jirka.

Drivers heerka si ugu horeysay

In go'aaminta waxa loola jeedo automata ee wadnaha, waxaa la ogaaday in falalkooda dareemayaasha loo ahbaa karaa unugyada myocardial atypical. Haddii qof uu yahay mid caafimaad qaba, habka ay taasi dhacdo dhow Guntin ku sinoatrial ay sabab u tahay kala duwan ee guryaha cell iyo qaab-dhismeedka qaybaha kale ee dhismaha. Waxay waxaa lagu abaabulaa kooxo, waxay leeyihiin qaab reer dunmiiqa ah, oo waxay hareereeyeen by lamina asalka. Magaca labaad ee unugyadan - darawallada oo ah heerka ugu horeysay si (pacemakers). hababka is-dhaafsiga dhici iyaga in xawaare sare, iyo sabab this metabolites ku sii dheecaanka interstitial, oo aan haysan in la soo rogay.

Intaa waxaa dheer, sifooyinka soo socda:

• permeability Saas ma aha ee sare si ay calcium iyo sodium udhigo.
• Qiimaha A yar oo iman kara xuub.

Maaddaama ay farqiga u fiirsashada of sodium iyo potassium tilmaamay hawl yar shaqeeya bamka sodium-potassium.

Automaticity waxyaalaha qalbiga ku jira

Waxay jeelyihiin in waqti dheer ma ahaa wadnaha automaticity ilaa ugu dambaysta baarayaa, inkastoo ay xiiso u sii kordhaya ee tacliinta ee geedi socodka this. Habka maryaba Stannius - tijaabo wareegga yaqaan qaadeen oo ku saleysan ka saarida ee qaybo ka mid ah ku dahaadhaa Duubista wadnaha rihii. Natiijooyinku waxay muujisay in jidhku waa la joogo xarunta 2 automaticity ugu yaraan.

Mid ka mid ah iyaga ka mid ah waxa uu ku yaalaa sanka ka arooriyaha, fududaysa simaya gaabiyey labaad - waa in qayb ka dhexeeya ventricle iyo atria (waxaa kaloo loo yaqaan qarsoon). Shuqulkiisa ay bilowdey kaliya ka dib markii reebay 1 dhexe. muruqa wadnaha, taasoo fog ka xarumaha labada shuqullada - hoos - on iyaga u gaar ah. Sayidka, automaton ee wadnaha aadanaha waxa uu la xidhiidhaa falalkooda ka imaanaya xarumahan.

Tabaha Landergorfa

In si loo yareeyo buriyay baxsan qalbiga jidhka, hab Landergorfa. macnaha waa sida soo socota:

1. Heart soo jaro geliso oo irbadi ku galay quseyo, taas oo ku xiran weel muraayad ah.
2. Markabka ayaa waxaa ka buuxsamay xal Ringer ee ay la socdaan glucose, ama laga yaabaa in lagu daray dhiig defibrinated.
3. Xalka waxaa cokan oxygen iyo kululeeyo si heer kulka gaar ah (oo ku saabsan 48 degrees Celsius).
4. Dheecaan bilaabaa inuu ka duuli cadaadis in ay xiranto waalka quseyo iyo dareeraha ah la faray galay halbowlaha wadnaha, shaqada kuwaas oo - xoogga xubnaha oo dhan.

Under xaaladaha sida, jidhka xoolaha ee, ama qofka waa in ay ka shaqeeyaan muddo dheer awoodi, tani waa automaticity ee wadnaha. Isticmaalka habkan, aad ku noqon karto ay la karsado oo ka mid ah wadnaha, kaas oo uu horey u joojiyay dhowr maalmood ka hor. In qarnigii 20aad markii ugu horeysay u soo baxay inaan soo nooleeyo meydka ilmo yar, oo mar dambe kaliya soo kabsaday shaqo ee wadnaha, taasoo aan ku shaqeeya ku dhawaad 48 saacadood. Ka dib markii maraya xalka marinnada wadnaha la hayo ee ku saabsan 15 saacadood.

Description Hab-Automatic

automaticity qalbiga aadanaha bilaabmaa wajiga diastole ay muujinta - of sodium galay dhaqdhaqaaqa unugyada. iman kara xuub sidaas si weyn u dhimay, waxa ay u egtahay in ay qiimaha heerka ugu hooseeya ee depolarization. Hoos u mas'uul ka ah xuub, oo uu bilaabo depolarization la'ahay of diastole. channels Open for calcium iyo sodium in wajiga la soomo durduri depolarization, udhigo bilaabaan si firfircoon faray in ay gacanta. Sababtoo ah lacag this, marka hore jir- hoos iyo eber gaadho, ka dibna ka soo horjeeda la bedelay. Sodium kor u guuro ilaa hoganaya la gaaro by udhigo ay (electrochemical).

Waxaa jira yimaado wejiga dhulka taagga ah. Waxaa sii dhaqdhaqaaqa calcium. unugyada wadnaha ayaa weli nonexcitability markan. Markay hoganaya udhigo khuseeya darafyadiisa oo wajiga iyo repolarization dhacdaa, taas oo macnaheedu yahay in ay heer asalka soo laabtay lacag xuub.

Qanjidhada wadnaha automaticity

Meel gaarka ah ee geedi socodka adag mashquulin goobaha of automaticity wadnaha. si ugu horeeyay waxaa lagu magacaabaa Guntin ku sinoatrial. darawalka Tani waa heerka koowaad ee si ah, kaas oo hubinaya in heerka wadnaha caadi ah. Dhowdaha kulanka of cava ku vena ka xoogbadan. Its qaab-dhismeedka - tiro yar oo ah macdantaa muruqa wadnaha la dhammaato neural. Guntin si labaad yeedhay Guntin ku atrioventricular. Tani waa darawalka qarsoon ee heerka labaad ee amarka. Waxaa ku jira saddexaad si unugyada Guntin nidaamka tabinta ventricular ah.

Dhammaan wadayaasha taageeraan maamulka hoose heerka si heerka sicirka, haddii ay jiraan waa block a wadnaha dhamaystiran. Inta jeer ee heerka ventricular socdo heerka ugu yar, iyo bukaanada nimo nooca korontada pacemaker, i.e. pacemaker macmal ah.

ah ee ka iman kara

Guntin kala duwan ka iman kara sinoatrial ka Ilodanimada caadiga ah ee - 50 MV. In ku guuleysan kara gobolka caadi muuqashada at Guntin ah ay sabab u tahay jiritaanka unugyada in ay yihiin darawallada ee heerka koowaad ee amarka. qaybo ka haray qalbigiisa ku xiran shuruudo gaar ah sidoo kale dhalin falalkooda dareemayaasha markii kicitaankan dheeraad ah, iyo sidoo kale deminta si ugu horeysay. Sayidka, jiilka of digir in Guntin amarka labaad (inta jeer 60 jeer / min). Inta lagu guda jiro kicinta ee unugyada Guntin xidhmadiisii uu aad ugu faraxsan, inta jeer ee hoos ilaa 30 (heerka wadayaasha saddexaad si).

Awood ay tallaabo oo dhan pacemakers waa si toos ah saamiyeed si ay permeability u xuub sare si ay calcium iyo sodium udhigo, iyo in la yareeyo permeability ee udhigo potassium.

automaticity Wehliyaha

Automaticity qalbiga ku hoos jira xaalad caadi ah oo dhan qeybo ka mid ah nidaamka u dhigan Guntin sinoarterialnym "rogi" ay laxanka u gaar ah. Sababtan awgeed, dhammaan qaybaha nidaamka la dhiso laxanka u gaar ah si ay uga shaqeeyaan xawaaraha isku. automaticity wadnaha Wehliyaha - arrin taas oo yaraynaysa awood u leh inay automaticity sida masaafada ka karsado guud meel, i.e. ah Guntin hore si.

Wali lama oga waxa sababa isbeddelka kadis ah in amarka gacanta, degna dhacdaa. Automaticity qalbiga la xiriira waxaa laga yaabaa in ay ka kooban of acetylcholine in darawallada of laxanka. saynisyahano badan ayaa waxay aaminsan yihiin in ifafaale ah waxaa sabab u ah dhegyadii shiid in unugyada darawalka, kaas oo beddeli karaan gobolka xuubka dusha sare.