![AV node ua dab tsi? AV node ua dab tsi?](https://i.answers-medical.com/preview/medical-health/13863461-what-does-the-av-node-do-j.webp)
Video: AV node ua dab tsi?
![Video: AV node ua dab tsi? Video: AV node ua dab tsi?](https://i.ytimg.com/vi/TnFoJ7Hhi-M/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
AV node (atrioventricular node).
AV node yog pawg ntawm cov cell nyob hauv plawv plawv nruab nrab ntawm atria thiab lub ntsws , thiab ua zoo li lub qhov rooj uas qeeb cov teeb liab hluav taws xob ua ntej nws nkag mus rau hauv lub ntsws . Qhov kev ncua no muab sijhawm rau atria los cog lus ua ntej lub ntsws ua.
Yog li, lub luag haujlwm tseem ceeb ntawm AV node yog dab tsi?
AV node, uas tswj hwm lub plawv dhia, yog ib qho tseem ceeb hauv kev ua haujlwm plawv. AV node ua haujlwm rau chaw nres tsheb hluav taws xob, ua kom lub zog hluav taws xob xa los ntawm sinoatrial (SA) ntawm qhov ua ntej lub teeb liab raug tso cai kom dhau mus rau lub ntsws.
Ib qho ntxiv, yuav ua li cas AV node qeeb? Parasympathetic (vagal) ua kom qis dua kev coj tshaj tawm (tsis zoo dromotropy) ntawm AV node los ntawm kev txo qis txoj kab nqes ntawm theem 0 ntawm kev ua haujlwm nodal. Qhov no ua rau qeeb qeeb depolarization ntawm cov cell uas nyob ib sab, thiab txo qhov nrawm ntawm kev coj.
Ntxiv mus, yuav muaj dab tsi tshwm sim yog tias AV node tsis ua?
Cov teeb meem ntawm AV node tuaj yeem ua rau mob plawv tsis zoo, uas lub plawv tuaj yeem qeeb qeeb (bradycardia) lossis nrawm heev (tachycardia). Ob leeg bradycardia lossis tachycardia tuaj yeem tsim cov tsos mob tseem ceeb.
Ob txoj haujlwm ntawm AV node yog dab tsi?
Ib yam li xa cov kev xav los ntawm atria mus rau lub ntsws lub atrioventricular node muaj ob lub luag haujlwm tseem ceeb xws li: synchronization ntawm atrial thiab ventricular contractions los ntawm qhov sib txawv qeeb; thiab kev tiv thaiv ntawm lub ntsws los ntawm kev mob atrial arrhythmias sai.
Pom zoo:
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