Muruqa Wadnaha - muuqaalada jidh iyo nafeedba

muruqa wadnaha wuxuu bixiyaa hawlaha muhiimka ah ee dhammaan unugyada, unugyada iyo xubnaha. Gaadiidka of walxaha ee jirka waxaa lagu fuliyaa iyada oo wareegga dhiigga si joogto ah; Waxa kale oo ay bixisaa oo ay hayaan homeostasis.

Dhismaha muruqa wadnaha

wadnaha waxaa wakiil laba qaybood - Midig iyo Bidix, kuwaasoo mid walba uu ka kooban yahay atria iyo intraventricular. Qeybtii bidix ee wadnaha ugu shubmo ee dhiigga halbowlaha, iyo xaq - arooriyaha. Sidaa darteed, muruqa wadnaha ee qeybta bidix ee waa badan sii dhumuc weyn tahay xaq. Muruqyada atria iyo intraventricular kala siddo buunshada kaas oo ay leeyihiin filtarka atrioventricular: laba-laabma (qeybtii bidix ee wadnaha) iyo tricuspid (qeybtii midig ee wadnaha). filtarka inta lagu jiro foosha wadnaha looga hortago soo laabashada dhiig atria ah. At baxo oo ka mid ah quseyo iyo halbowlaha pulmonary waxaa labadii kaalinta khaanadaha, kaas oo looga hortago soo noqoshada dhiigga intraventricular lagu jiro qalbiga diastole total.

muruqa wadnaha ee iska leh striated unugyada muruqa. Sidaa darteed, muruqa this leedahay sifooyinka la mid ah sida in of murqaha lafaha. fiber muruqa ka kooban yahay sarcolemma myofibrillar iyo sarcoplasmic.

Thanks to wadnaha si ay uga soo dhiigga maraya marinnada dhiigga. foosha ayaa jiibta ee muruqyada atria iyo intraventricular ah (systole) Gagadiyaa ay nasashada (diastole). isbedel isku xig xiga ee systole iyo diastole ee wareegga wadnaha. muruqa wadnaha ayaa rhythmically shaqeeyo, in uu bixiyo nidaamka, qabashada cadhoodaan in qaybaha kala duwan ee qalbiga ku

The guryaha nafsaaniga ah ee muruqa wadnaha

excitability ee myocardium ah - tahay awooddiisa ah inuu fal ku meersan korontada, farsamo, kulka iyo kiimikada. The excitation iyo foosha muruqyada wadnaha waxay dhacdaa marka heshaa gaaro ciidamo marinka ah. marinkii cuncun yar ma aha wax ku ool ah iyo ma beddeli ciidanka suprathreshold ee foosha myocardial.

Excitation unugyada muruqa qalbiga ku weheliyay muuqaalka ah ee ku iman kara talaabada. Wuu gaabiyey iyo dheeraado at dhaqsad deceleration garaaca wadnaha ah.

muruqa wadnaha faraxsanahay kooban lumiyo awooda in ay ka jawaabaan ku meersan dheeraad ah ama falalkooda ka imaanaya isha automaticity. Tan waxaa loo yaqaan madax adkaadeen non-excitable. meersan Strong in dhaqmaan on muruqa in muddo ah refractoriness qaraabo in ay keeni foosha aan caadi ahayn, waxaa qalbiga ka - waxa loogu yeero garaaca dhicis ah.

Myocardial infarction leedahay Tilmaamo marka la barbardhigo unugyada muruqa lafaha. The excitation iyo foosha ee muruqa wadnaha muddo dheer ka badan lafaha. In muruqa wadnaha geedi socodka laylinta adkaan xeryahooda resynthesis hodan. Inta lagu guda jiro diastole, waxaa jira isbedel toos ah ku iman kara xuub ee unugyada badan oo meelo kala duwan oo goobta. Sidaa reyn ku fidaa muruqyada atria iyo gaadho Guntin ku atrioventricular, taas waxaa loo arkaa xarunta of automaticity II si. Haddii Guntin sinoatrial off (ligated, qaboojinta, sunta), ka dibna muddo ka dib intraventricular bilaabaan inay qandaraas laxanka wax dhif ah sarkhaansan yihiin falalkooda ka dhalatey in Guntin ku atrioventricular.

Tabinta of excitation in qaybaha kala duwan ee wadnaha aan qummanaynu. waa in aan ku dhahaynno in xayawaanka diiran dilaa ah heerka of excitation macdantaa muruq wadne-waa ah oo ku saabsan 1.0 m / s, nidaam ventricular tabinta in 4.2 m / s, ee myocardium ah ventricular in 0.9 m / s.

Muuqaalka caan ku excitation ee muruqa wadnaha waa in laga yaabo in tallaabada ay sababtay in mid ka mid ah qayb ka mid ah unugyada muruqa, ku faafay goobo kale.