![Dab tsi yog rhythmicity ntawm lub plawv? Dab tsi yog rhythmicity ntawm lub plawv?](https://i.answers-medical.com/preview/medical-health/14159725-what-is-rhythmicity-of-the-heart-j.webp)
Video: Dab tsi yog rhythmicity ntawm lub plawv?
![Video: Dab tsi yog rhythmicity ntawm lub plawv? Video: Dab tsi yog rhythmicity ntawm lub plawv?](https://i.ytimg.com/vi/WIPZ81TYMkk/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Plawv kev sib dhos yog qhov tshwm sim ntawm tus kheej depolarization thiab repolarization tshwm sim uas tshwm sim nyob rau hauv ib qho kev rov ua dua thiab ruaj khov nyob rau hauv lub plawv cov leeg. Rhythmicity feem ntau txawv txav los yog poob rau hauv cov xwm txheej ntawm lub plawv tsis ua haujlwm lossis lub plawv tsis ua haujlwm.
Ib sab ntawm qhov no, Autorhythmicity ntawm lub plawv yog dab tsi?
Autorhythmicity yog ib tug tshwj xeeb feature ntawm lub plawv mob hlwb. Cov hlwb no muaj peev xwm ua kom muaj peev xwm ua tau ntawm ib tus nqi yam tsis muaj kev txhawb nqa sab nraud vim qhov twg plawv ntaus tsis tu ncua thiab rhythmically.
Tom qab ntawd, lo lus nug yog, dab tsi pib ua kom lub plawv qis? Pathway ntawm Plawv Cov leeg Kev cog lus Ib qho kev ua tau zoo, raug ntxias los ntawm cov pacemaker hlwb hauv sinoatrial (SA) thiab atrioventricular (AV) nodes, yog ua rau contractile cardiomyocytes los ntawm qhov sib txawv junctions. Qhov kev tshem tawm ntawm troponin complex tso cov actin kom raug khi los ntawm myosin thiab pib contraction.
Ib sab saum toj no, dab tsi yog qhov txaus siab ntawm lub plawv?
Excitability yog lub peev xwm ntawm kab mob plawv tsim kom muaj peev xwm ua tau ntawm nws daim nyias nyias hauv kev teb rau kev tshem tawm thiab xa tawm qhov tsis txaus ntseeg raws daim nyias nyias. Lub upstroke ntawm qhov muaj peev xwm ua tau pib thaum lub peev xwm ntawm −55 txog −60 mV tau mus txog.
Lub cev thiab lub cev ntawm lub plawv yog dab tsi?
Cov plawv yog ib lub cev nqaij daim tawv li qhov loj ntawm lub nrig kaw. Nws zaum hauv siab, me ntsis mus rau sab laug ntawm qhov chaw. Raws li cov plawv kev cog lus, nws tso ntshav thoob plaws lub cev. Nws nqa cov ntshav deoxygenated mus rau lub ntsws qhov chaw uas nws thauj cov pa oxygen thiab tshem tawm cov pa roj carbon dioxide, cov khoom pov tseg ntawm cov metabolism.
Pom zoo:
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Lub hauv paus ntawm lub plawv (sab nraub qaum): Nws tau tsim los ntawm sab laug atrium, uas yog plaub txoj hlab ntshav hlab ntshav. Nws nyob ntawm qhov ntxeev ntawm lub apex
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Cov khoom siv hauv lub cev zom zaub mov suav nrog cov hniav, tus nplaig, cov qog ua kua qaub, daim siab, lub zais zis, thiab txiav txiav. Txhawm rau ua tiav lub hom phiaj ntawm kev muab lub zog thiab khoom noj khoom haus rau lub cev, rau lub luag haujlwm tseem ceeb nyob hauv cov txheej txheem zom zaub mov: nqos. Kev zais. Sib tov thiab txav mus los. Digestion. Kev nqus. Kev tshem tawm
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Sab xis ntawm lub plawv khaws cov ntshav tsis zoo los ntawm lub cev thiab tso nws mus rau lub ntsws. Sab laug ntawm lub plawv sau cov ntshav uas muaj oxygen los ntawm lub ntsws thiab tso nws mus rau lub cev
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Pulmonary circulation yog ib feem ntawm lub circulatory system uas nqa cov ntshav deoxygenated tawm ntawm txoj cai ventricle, mus rau lub ntsws, thiab xa cov ntshav oxygenated rov qab mus rau sab laug atrium thiab ventricle ntawm lub plawv
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Raws li ib feem ntawm pab pawg, tus kws kho mob lub plawv tsis ua haujlwm tau zoo muab rau muab kev pabcuam rau cov neeg mob thoob plaws txoj kev mob plawv tsis ua haujlwm thiab qhov no yuav tsum muaj kev koom tes ze nrog kws saib xyuas mob hauv thaj chaw tshwj xeeb tshwj xeeb xws li chav kho mob xwm txheej ceev thiab kev kho mob dav/ saib xyuas-ntawm-tus-neeg laus