![Lub sijhawm PR ib txwm muaj li cas? Lub sijhawm PR ib txwm muaj li cas?](https://i.answers-medical.com/preview/medical-health/14123001-what-is-the-length-of-a-normal-pr-interval-j.webp)
Video: Lub sijhawm PR ib txwm muaj li cas?
![Video: Lub sijhawm PR ib txwm muaj li cas? Video: Lub sijhawm PR ib txwm muaj li cas?](https://i.ytimg.com/vi/Ow52VVhZaBE/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).
Ib yam li ntawd, nws raug nug, qhov ntev PR lub sijhawm txhais li cas?
Ntev. Ib ntev PR ncua sijhawm (ntawm ntau dua 200 ms) qhia txog kev ua kom qeeb ntawm atria thiab ventricles, feem ntau yog los ntawm kev coj qeeb los ntawm atrioventricular node (AV node). Qhov no yog hu ua thawj qib plawv thaiv.
Qhov thib ob, puas yog lub sijhawm luv PR ib txwm muaj? Cov neeg mob uas muaj kev sib cais ntawm kev tshawb pom luv PR luv tej zaum yuav yog tus yam ntxwv ua kom nrawm AV nodal conduction. Cov Qauv rau LGL suav nrog a PR ncua sijhawm tsawg dua lossis sib npaug li 0.12 thib ob (120 ms), ib txwm QRS lub sijhawm ntev tsawg dua 120 ms, thiab tshwm sim ntawm kev kho mob tachycardia.
Hais txog qhov no, yuav ua li cas PR ncua sijhawm ntev?
P-R Interval Thawj qhov kev ntsuas yog hu ua "P-R ntu" thiab ntsuas los ntawm qhov pib ntawm qhov nce ntawm P nthwv dej mus rau qhov pib ntawm QRS nthwv dej. Qhov ntsuas no yuav tsum yog 0.12-0.20 vib nas this , lossis 3-5 lub xwmfab me me nyob rau lub sijhawm.
Puas yog PR ncua sijhawm ib yam dab tsi txhawj xeeb txog?
Paub daws teeb. Ntev PR ncua sij hawm , 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.
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