Qhov txawv ntawm 1st 2nd thiab 3rd Degree Heart Block yog hais tias nyob rau hauv thawj-degree lub plawv blocks, tag nrho cov hluav taws xob impulses uas originated nyob rau hauv lub SA node yog ua mus rau lub ventricles, tab sis muaj ib tug ncua sij hawm nyob rau hauv lub propagation ntawm hluav taws xob kev ua ub no, uas yog qhia los ntawm ib tug prolongation ntawm lub sij hawm PR. Ua tsis tiav ntawm qee qhov p nthwv dej kom nthuav tawm mus rau hauv lub ventricles yog cov yam ntxwv ntawm lub plawv thib ob. Tsis muaj P nthwv dej uas tsim nyob rau hauv lub atria yog ua rau lub ventricles nyob rau hauv lub thib peb-degree lub plawv blocks.
Kev ua haujlwm ntawm lub plawv yog tsim los ntawm ob peb yam tseem ceeb uas suav nrog SA node, AV node, pob ntawm nws, txoj cai pob ceg thaiv thiab sab laug pob ceg thaiv. Thaum muaj teeb meem nyob rau hauv no conduction system uas ua rau kom lub plawv blocks. Muaj peb yam tseem ceeb ntawm lub plawv blocks thawj, thib ob thiab thib peb-degree lub plawv blocks.
Dab tsi yog 1st Degree Heart Block?
Tag nrho cov hluav taws xob impulses originated nyob rau hauv lub SA node yog ua rau lub ventricles, tab sis muaj ib tug ncua sij hawm nyob rau hauv lub propagation ntawm cov hluav taws xob kev ua si uas yog qhia los ntawm ib tug ncua sij hawm ntawm PR interval.
Daim duab 01: Lub Siab Rate of 1st Degree Heart Block
Thawj-degree lub plawv thaiv feem ntau yog mob benign tab sis tuaj yeem yog vim muaj kab mob plawv, mob rheumatic carditis, thiab digoxin toxicity.
Dab tsi yog 2nd Degree Heart Block?
Ua tsis tiav ntawm qee qhov p nthwv dej kom nthuav tawm mus rau hauv lub ventricles yog tus yam ntxwv ntawm lub plawv thib ob. Muaj peb yam tseem ceeb ntawm 2nd-degree heart blocks.
Mobitz yam 1
Muaj qhov kev ncua ntev ntawm PR lub sijhawm uas thaum kawg xaus nrog kev ua tsis tiav ntawm P nthwv dej kom nthuav tawm mus rau hauv cov hlab ntsha. Qhov no yog lub npe hu ua Wenckebach phenomenon.
Mobitz hom 2
Daim duab 02: Lub plawv dhia 2nd Degree Heart Block
Lub sijhawm PR tseem zoo li qub uas tsis muaj qhov hloov pauv tab sis qee zaus P nthwv dej ploj yam tsis tau ua rau hauv lub ventricles.
Pab pawg thib peb yog qhov tshwm sim los ntawm qhov muaj P nthwv dej rau txhua 2 lossis 3 ua P nthwv dej
Mobitz hom 2 thiab pawg thib peb yog cov kab mob pathological.
3rd Degree Heart Block?
Tsis muaj P nthwv dej uas tsim tawm hauv lub atria raug coj mus rau ventricles. Lub ventricular contraction tshwm sim los ntawm generating intrinsic impulses. Yog li ntawd, tsis muaj kev sib raug zoo ntawm P nthwv dej thiab QRS complexes.
Daim duab 03: Lub Siab Rate of 3rd Degree Heart Block
Cov blocks no tuaj yeem yog vim muaj kev mob plab thaum lawv tsuas yog ncua sijhawm. Kev thaiv kab mob yog feem ntau yog vim yog fibrosis ntawm lub pob ntawm nws.
Dab tsi yog qhov zoo sib xws ntawm 1st 2nd thiab 3rd Degree Heart Block ?
Txhua yam xwm txheej yog vim muaj qhov tsis xws luag hauv kev coj ua ntawm lub plawv
Qhov txawv ntawm 1st 2nd thiab 3rd Degree Heart Block ?
Tag nrho cov hluav taws xob impulses originated nyob rau hauv lub SA node yog ua rau lub ventricles nyob rau hauv lub 1st lub plawv block, tab sis muaj ib tug ncua sij hawm nyob rau hauv lub propagation ntawm cov hluav taws xob kev ua si uas yog qhia los ntawm ib tug ncua sij hawm ntawm PR. Thaum nyob rau hauv 2 ndlub plawv thaiv, tsis ua hauj lwm ntawm qee qhov p nthwv dej kom nthuav tawm mus rau hauv lub ventricles yog cov yam ntxwv ntawm lub plawv thib ob. Tsis muaj P nthwv dej tsim nyob rau hauv atria yog ua rau lub ventricles nyob rau hauv 3rd degree lub plawv thaiv. Nov yog qhov txawv ntawm 1st 2nd thiab 3rd Degree Heart Block.
Summary – 1st 2nd vs 3rd Degree Heart Block
Lub plawv blocks tshwm sim thib ob rau qhov tsis xws luag hauv kev ua haujlwm ntawm lub plawv. Nyob rau hauv thawj-degree lub plawv blocks tag nrho cov hluav taws xob impulses uas originated nyob rau hauv lub SA node yog ua rau lub ventricles, tab sis muaj ib tug ncua sij hawm nyob rau hauv lub propagation ntawm hluav taws xob kev ua ub no uas qhia los ntawm ib tug ncua sij hawm ntawm PR interval. Ua tsis tiav ntawm qee qhov p nthwv dej kom nthuav tawm mus rau hauv lub ventricles yog cov yam ntxwv ntawm lub plawv thib ob. Tsis muaj P nthwv dej tsim nyob rau hauv lub atria yog ua rau lub ventricles nyob rau hauv lub thib peb-degree lub plawv blocks. Nov yog qhov txawv ntawm 1st 2nd thiab 3rd Degree Heart Block.
