Video: Txoj hauv kev hluav taws xob ntawm lub plawv yog dab tsi?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov hluav taws xob impulse taug kev los ntawm qhov sinus node mus rau atrioventricular node (tseem hu ua AV node ). Muaj, qhov kev xav tau qeeb qeeb rau lub sijhawm luv luv, tom qab ntawd txuas ntxiv mus rau hauv txoj kev coj ua los ntawm cov pob ntawm Nws mus rau hauv lub ntsws.
Tom qab ntawd, txoj kev hluav taws xob ntawm lub plawv yog dab tsi?
Cov khoom tseem ceeb ntawm lub plawv conduction system yog SA node, AV node , pob ntawm Nws , ntim cov ceg, thiab Purkinje fibers. Lub SA node (anatomical pacemaker) pib ua ntu zus los ntawm kev ua rau cov leeg nqaij atrial cog lus.
Kuj Paub, txoj kev coj mus rau hauv lub siab yog dab tsi? Kev ua cov cell xa cov ntawv cog lus cog rau lub myocardium. Txoj hauv kev ua kom lub plawv muaj ntawm SA node , cov AV node , thiab conduction fibers ntawm pob ntawm Nws thiab Purkinje fibers . Cov SA nug teev tus nqi ntawm lub plawv thiab ua rau lub atrium sib cog lus.
Ntawm no, cov hluav taws xob tam sim no ntws los ntawm lub plawv li cas?
Cov hluav taws xob teeb liab pib hauv pab pawg ntawm cov cell nyob saum koj plawv hu ua sinoatrial (SA) node. Lub teeb liab ces taug kev dhau koj plawv , ua ntej koj ob lub atria thiab tom qab ntawd koj ob lub ntsws. Lub sab sauv plawv chav (atria) daim ntawv cog lus. AV node xa qhov kev xav rau hauv lub ntsws.
Dab tsi yog kev coj ua ntawm lub siab?
Cov tswj qhov system ntawm plawv muaj mob plawv cov leeg nqaij thiab coj fibers (tsis yog paj hlwb) uas yog tshwj xeeb rau pib impulses thiab ua lawv sai dhau ntawm plawv (saib daim duab hauv qab no). Lawv pib qhov qub mob plawv voj voog thiab tswj kev cog lus ntawm mob plawv chav.
Pom zoo:
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