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Video: Koj yuav xam tus PR luv li cas?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov P-R ncua sijhawm
Thawj qhov ntsuas yog hu ua " P-R ncua sijhawm "thiab ntsuas los ntawm qhov pib ntawm qhov nce ntawm P wave mus rau qhov pib ntawm QRS yoj. Qhov ntsuas no yuav tsum yog 0.12-0.20 vib nas this, lossis 3-5 me me squares nyob rau lub sijhawm.
Cov lus nug tseem yog, dab tsi tshwm sim thaum lub sijhawm PR ntawm ib qho ECG ib txwm muaj?
Lub sijhawm sijhawm los ntawm qhov pib ntawm P yoj mus rau qhov pib ntawm QRS complex npe hu ua PR ncua sijhawm , uas ib txwm yog hom twg los ntawm 0.12 txog 0.20 vib nas this nyob rau hauv ntev. Qhov no ncua sijhawm sawv cev rau lub sijhawm nruab nrab ntawm qhov pib ntawm atrial depolarization thiab pib ntawm ventricular depolarization.
Kuj Paub, dab tsi yog qhov qub PR ncua rau cov neeg laus? PR ncua sij hawm. Lub sijhawm PR yog lub sijhawm txij li pib ntawm P yoj mus rau pib ntawm QRS txoj haujlwm. Nws qhia txog kev coj ua los ntawm AV node. Lub sijhawm PR ib txwm nyob ntawm 120 - 200 ms ( 0.12-0.20 s) hauv lub sijhawm (peb txog tsib lub xwmfab me).
Hauv qhov hais txog qhov no, dab tsi yog PR ib ntus?
Hauv electrocardiography, tus PR ncua sijhawm yog lub sijhawm, ntsuas hauv milliseconds, uas nthuav tawm los ntawm qhov pib ntawm P yoj (qhov pib ntawm atrial depolarization) kom txog rau thaum pib ntawm QRS txoj kev nyuaj (qhov pib ntawm kev tso pa tawm ntawm lub ntsws); nws yog ib txwm nyob nruab nrab ntawm 120 thiab 200ms nyob rau lub sijhawm.
Lub sijhawm RR txhais li cas?
RR ncua sijhawm , lub sijhawm dhau los ntawm ob qhov ua tiav R-nthwv dej ntawm QRS teeb liab ntawm lub tshuab hluav taws xob (thiab nws qhov sib txawv, HR) yog lub luag haujlwm ntawm cov khoom tseem ceeb ntawm cov leeg ntawm qhov ntswg nrog rau kev cuam tshuam ntawm tus kheej.
Pom zoo:
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