Video: Dab tsi ua rau AV dissociation?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
AV dissociation tshwm sim thaum lub atria thiab lub ventricles nyob rau hauv kev tswj ntawm cais pacemakers thiab tuav ntawm nws tus kheej ntawm ib leeg. Plaub ua ntawm AV dissociation suav nrog kev qeeb ntawm thawj lub tshuab ua kom nrawm, ua kom nrawm ntawm lub hauv paus pacemaker, AV thaiv, thiab cuam tshuam.
Hauv qhov no, AV dissociation yog dab tsi?
AV dissociation yog ib yam mob uas atrial activation (feem ntau yog los ntawm lub sinus node) yog ywj siab los ntawm ventricular activation (los ntawm qhov AV hlws ris, Nws-Purkinje system, lossis lub plawv).
Ib qho ntxiv, qhov sib txawv ntawm AV kev sib cais thiab ua tiav lub plawv thaiv yog dab tsi? Qhov tseem ceeb qhov sib txawv ntawm AV dissociation ua los ntawm "desynchronization" ntawm SA thiab AV nodes los ntawm kev ua tsis tiav thiab ua kom lub plawv nres yog raws li nram no: nrog AV dissociation (piv txwv li, hom isorhythmic) lub sijhawm zoo P nthwv dej tuaj yeem ua tiav mus rau AV node, whereas nrog siab tag
Raws li, puas yog AV kev sib cais txaus ntshai?
Cov teeb meem ntawm AV dissociation feem ntau yog vim muaj kev cuam tshuam hemodynamic vim yog cov txheej txheem uas ua rau AV dissociation (piv txwv li, ventricular tachycardia, hnyav sinus bradycardia). Cov ntshav qis thiab nrawm heev lossis qeeb lub plawv tuaj yeem ua rau muaj kev puas tsuaj syncope.
Dab tsi tshwm sim rau kev ntaus ntawm atria thiab lub ventricles thaum qib peb qib AV node block?
Qhia cov neeg mob ntawd peb - qib atrioventricular ( AV ) thaiv (tag nrho lub siab thaiv ) tshwm sim thaum lub teeb liab hluav taws xob pib ntawm lub plawv sab sauv, lub atria cov , tsis tuaj yeem dhau ib txwm mus rau sab hauv qab, lub lub ntsws . Qee zaum, cov neeg mob tuaj yeem asymptomatic.
Pom zoo:
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Dab tsi yog 2/3 DPG oxygen dissociation nkhaus?
2,3-BPG ua raws li heteroallosteric effector hemoglobin, txo qis hemoglobin kev sib raug zoo rau cov pa oxygen los ntawm kev khi tshwj xeeb rau deoxyhemoglobin. Kev nce siab ntxiv ntawm BPG hauv cov qe ntshav liab nyiam qhov tsim ntawm T, qis qis hauv lub xeev ntawm hemoglobin thiab yog li cov pa nkev-khi nkhaus yuav hloov mus rau sab xis
Dab tsi yog qhov oxyhemoglobin dissociation nkhaus qhia peb?
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Dab tsi cuam tshuam rau oxygen hemoglobin saturation dissociation nkhaus?
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Dab tsi ua rau cov pa oxygen dissociation nkhaus hloov mus rau sab xis?
Qhov nce ntawm qhov kub hloov pauv qhov nkhaus mus rau sab xis, thaum qhov ntsuas kub poob qis hloov txoj kab nkhaus mus rau sab laug. Ua kom qhov kub thiab txias denatures kev sib raug zoo ntawm oxygen thiab hemoglobin, uas ua rau kom cov pa oxygen thiab hemoglobin thiab txo cov concentration ntawm oxyhaemoglobin