![Lub sijhawm PR ib txwm yog dab tsi? Lub sijhawm PR ib txwm yog dab tsi?](https://i.answers-medical.com/preview/medical-health/13936826-what-is-a-normal-pr-interval-j.webp)
Video: Lub sijhawm PR ib txwm yog dab tsi?
![Video: Lub sijhawm PR ib txwm yog dab tsi? Video: Lub sijhawm PR ib txwm yog dab tsi?](https://i.ytimg.com/vi/YWgHkKK5NFY/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov PR ncua sijhawm yog lub sijhawm los ntawm qhov pib ntawm P nthwv dej mus rau qhov pib ntawm lub QRS nyuaj. Nws qhia txog kev coj ua los ntawm AV node. Cov ib txwm PR ncua sijhawm yog nruab nrab ntawm 120-200 ms (0.12-0.20s) nyob rau lub sijhawm (peb txog tsib lub xwmfab me). Yog tias PR ncua sijhawm yog> 200 ms, thawj qib ntawm lub plawv thaiv tau hais tias tam sim no.
Ib yam li ntawd, lub sijhawm PR yog dab tsi?
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 muaj txij li 0.12 txog 0.20 vib nas this hauv lub sijhawm. Qhov no ncua sij hawm sawv cev lub sijhawm nruab nrab ntawm qhov pib ntawm atrial depolarization thiab pib ntawm ventricular depolarization.
Ib sab saum toj no, puas yog luv luv PR ib txwm? Cov neeg mob uas muaj qhov kev tshawb pom cais luv PR luv tej zaum yuav yog tus yam ntxwv ua kom nrawm AV nodal conduction. Cov txheej txheem rau LGL suav nrog a PR ncua sijhawm tsawg dua lossis sib npaug rau 0.12 thib ob (120 ms), normal QRS lub sijhawm ntev tsawg dua 120 ms, thiab tshwm sim ntawm kev kho mob tachycardia.
Raws li, yog PR ncua sij hawm ntev ntev dab tsi los txhawj txog?
Paub daws teeb. Ntev PR ncua sijhawm , los yog thawj degree AV thaiv, tau ib txwm suav tias yog ib qho benign electrocardiographic nrhiav nyob rau hauv cov tib neeg noj qab haus huv, kom txog rau thaum cov kev tshawb fawb tsis ntev los no tau qhia tias nws yuav cuam tshuam nrog nce kev tuag thiab kev mob nkeeg.
Vim li cas lub sijhawm PR tseem ceeb?
Cov PR ncua sijhawm qhia seb puas impulse conduction ntawm lub atria mus rau lub ventricles yog ib txwm. Cov PR ntu yog txoj kab ncaj nraim nruab nrab ntawm qhov kawg ntawm P-wave thiab pib ntawm QRS complex. Cov PR ntu qhia txog lub sijhawm ncua ntawm atrial thiab ventricular activation.
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