![Qhov twg yuav ua rau qhov txo qis tshaj plaws hauv lub siab ntawm cov hlab ntsha? Qhov twg yuav ua rau qhov txo qis tshaj plaws hauv lub siab ntawm cov hlab ntsha?](https://i.answers-medical.com/preview/medical-health/14148788-which-would-cause-the-greatest-decrease-in-mean-arterial-pressure-j.webp)
Video: Qhov twg yuav ua rau qhov txo qis tshaj plaws hauv lub siab ntawm cov hlab ntsha?
![Video: Qhov twg yuav ua rau qhov txo qis tshaj plaws hauv lub siab ntawm cov hlab ntsha? Video: Qhov twg yuav ua rau qhov txo qis tshaj plaws hauv lub siab ntawm cov hlab ntsha?](https://i.ytimg.com/vi/o8xY2CKLcOA/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Arterioles muaj ntau tshaj nce nyob rau hauv kuj thiab ua rau qhov txo qis tshaj plaws hauv ntshav siab . Lub constriction ntawm arterioles tsub kom tsis kam uas ua rau a txo hauv ntshav ntws mus rau hauv cov hlab ntsha hauv qab thiab loj dua txo hauv ntshav siab.
Ib yam li ntawd, tib neeg nug, dab tsi ua rau txo qis hauv cov ntshav siab?
Tsawg MAP tuaj yeem ua rau muaj kev phom sij rau lub neej thiab. Thaum MAP tau qis dua 60, cov kabmob tseem ceeb hauv lub cev tsis tau txais cov khoom noj uas lawv xav tau kom muaj sia nyob. Thaum nws tau txais qis , nws tuaj yeem ua rau poob siab thiab thaum kawg tuag ntawm cov cell thiab cov kab ke hauv nruab nrog cev. Tsawg txhais tau tias arterial siab tuaj yeem yog ua los ntawm sepsis, stroke, hemorrhaging, los yog raug mob.
dab tsi cuam tshuam txog ntshav siab? Cov xwm txheej Tswj Ntshav Siab Ntshav Qab Zib . Txhais tau tias arterial siab yog tswj los ntawm cov kev hloov hauv lub plawv tso zis thiab systemic vascular kuj. Kev txo qis hauv kev ua raws venous, raws li tshwm sim thaum cov hlab ntsha constrict, nce ventricular preload los ntawm kev nce hauv nruab nrab venous. siab.
Xav txog qhov no, dab tsi ua rau txhais tau tias cov ntshav siab nce ntxiv?
Tus nab npawb no nyob hauv kab ntawv yog txhais tau tias ntshav siab (MAP). Piv txwv li, nws nyuaj rau ntshav ntws los ntawm qhov nqaim cov leeg . Raws li kev tawm tsam hauv koj cov hlab ntsha nce , ntshav siab kuj nce thaum lub flow ntawm ntshav txo.
Ob qhov kev tswj hwm loj ntawm cov ntshav siab txhais li cas?
Tswj Cov tshuab Arterial ntshav siab yog tswj los ntawm lub raum. Cov ob kev txiav txim ntawm ntshav siab yog qhov ntim ntawm lub raum tso zis thiab tus nqi ntsev thiab dej hauv qhov system. Lub raum tswj lub raum tso tawm los ntawm kev hloov pauv cov kua dej sab nraud.
Pom zoo:
Cov hlab ntsha qis hauv cov hlab ntsha ntws mus rau qhov twg?
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Brachiocephalic leeg
Cov hlab ntsha twg tuaj yeem khaws cov qog ntshav los ntawm lub hauv siab thiab hauv qab hauv lub cev?
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Cev thoracic
Puas yog Neuroglia tsim cov hlab ntsha hauv cov hlab ntsha hauv nruab nrab cov hlab ntsha?
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Muaj plaub hom neuroglia pom nyob hauv nruab nrab lub paj hlwb: Astrocytes - tswj cov ntshav lub hlwb teeb meem thiab khaws cov tshuaj ib puag ncig los ntawm kev siv cov ions rov qab thiab cov tshuaj xa xov mus rau lub cev. Oligodendrocytes - myelinate axons nyob rau hauv lub hauv nruab nrab lub paj hlwb thiab muab tag nrho cov txheej txheem txheej txheem
Puas yog qhov txo qis ntshav ntws mus rau lub plawv tshwm sim los ntawm kev sib sau ntawm cov rog rog hauv cov hlab ntsha?
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Atherosclerosis (tej zaum hu ua 'hardening' los yog 'clogging' ntawm cov hlab ntsha) yog tsim cov roj cholesterol thiab fatty deposits (hu ua plaques) nyob rau sab hauv phab ntsa ntawm cov hlab ntsha. Cov quav hniav no tuaj yeem txwv cov ntshav ntws mus rau cov leeg nqaij hauv lub cev los ntawm kev txhaws cov hlab ntshav lossis ua rau lub suab nrov txawv txav thiab ua haujlwm
Cov hlab ntsha twg cov ntshav siab mus txog qhov ntsuas siab tshaj plaws?
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Cov hlab ntsha loj tau txais lub siab tshaj plaws ntawm cov ntshav ntws thiab ntau tuab thiab ywj kom haum rau qhov siab. Cov hlab ntsha me, xws li arterioles, muaj cov leeg du uas sib cog lus lossis so kom tswj cov ntshav ntws mus rau qee qhov ntawm lub cev