Video: Qhov tseem ceeb ntawm PQ PR ncua sijhawm yog dab tsi?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov PQ luv ( PR ncua sijhawm ) sawv cev rau lub sijhawm coj los ntawm SA node hla AV node thiab His-Purkinje system. Kev hloov pauv ntawm tus nees ua pa txawv txav thiab ntshav siab, lub plawv dhia, thiab lub suab tsis sib xws tuaj yeem hloov lub sijhawm PQ luv.
Yog li ntawd, PQ ncua nruab nrab 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 yam nkaus, PR txhais li cas hauv EKG? Hauv electrocardiography, tus PR ncua sijhawm yog lub sijhawm, ntsuas hauv milliseconds, uas nthuav tawm los ntawm kev pib P wave (qhov pib ntawm atrial depolarization) txog thaum pib ntawm QRS txoj kev nyuaj (qhov pib ntawm kev tso pa tawm ntawm lub ntsws); nws yog feem ntau ntawm 120 thiab 200ms nyob rau lub sijhawm.
Yog li ntawd, vim li cas thiaj hu ua PR ncua thiab tsis yog PQ luv?
Cov PR ncua sijhawm yog ntsuas los ntawm qhov pib ntawm P wave mus rau qhov pib ntawm QRS nyuaj. Lub sij hawm " PQ luv "Yog qhov xav tau los ntawm qee tus kws ntsuas hluav taws xob vim tias nws yog lub sijhawm ntsuas tau tshwj tsis yog Q ntoj ke mus. Hauv cov neeg laus qhov qub PR ncua sijhawm yog 0.12 txog 0.20 thib ob.
Kev nce qib PR txhais li cas?
Cov PR interval yog lub sijhawm txij thaum pib ntawm P yoj (atrial depolarization) mus rau qhov pib ntawm QRS complex (ventricular depolarization). A ncua ntev los yog luv PR ncua sijhawm tau qhia kab mob. Thaum twg ncua ntev , thawj qib AV thaiv tam sim no.
Pom zoo:
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