![Dab tsi ua rau kom mob stroke thaum lub sijhawm ua si? Dab tsi ua rau kom mob stroke thaum lub sijhawm ua si?](https://i.answers-medical.com/preview/medical-health/14055515-what-increases-stroke-volume-during-exercise-j.webp)
Video: Dab tsi ua rau kom mob stroke thaum lub sijhawm ua si?
![Video: Dab tsi ua rau kom mob stroke thaum lub sijhawm ua si? Video: Dab tsi ua rau kom mob stroke thaum lub sijhawm ua si?](https://i.ytimg.com/vi/qPQXtJPQOzo/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Vasodilation ntawm arterioles nyob rau hauv cov pob txha thiab lub plawv cov leeg thiab cov tawv nqaij ua rau ib tug txo nyob rau hauv tag nrho peripheral tsis kam mus rau cov ntshav khiav. Cov stroke ntim nce vim tias muaj zog ventricular contractility, manifested los ntawm ib tug nce ejection feem thiab kho los ntawm sympathetic qab haus huv rau lub ventricular myocardium.
Tib neeg tseem nug, ntau npaum li cas mob hlab ntsha tawg nce ntxiv thaum ua haujlwm?
Stroke ntim thiab lub plawv tso zis Stroke ntim nce li ntawm 20-50% nyob rau hauv kev hloov ntawm so rau submaximal qoj ib ce . Nws ua tsis hloov raws li kev siv ntawm qoj ib ce nce los ntawm kwv yees li 40% txog 100%, txawm hais tias lub sijhawm muaj tsawg rau qhov ua kom lub qhov tso pa tawm ntawm lub plawv dhia siab thaum qoj ib ce.
Dab tsi ua rau qhov hloov pauv hauv ESV ntim nrog kev tawm dag zog? Hloov nyob rau hauv ventricular inotropy (contractility) hloov tus nqi ntawm ventricular siab txoj kev loj hlob, yog li cuam tshuam rau ESV thiab SV. Tsis tas li ntawd, yog tias SV nce ntxiv los ntawm kev nce EDV, qhov no tuaj yeem ua rau nce me me ESV vim yog qhov cuam tshuam ntawm kev nce ntxiv tom qab ESV vim los ntawm kev nce hauv siab aortic.
Nyob rau hauv no hais txog, dab tsi yog ob yam uas ua rau lub plawv tso zis ntau zog thaum lub sij hawm ce?
Cov cardiac tso zis yog nce ob ob a sawv nyob rau hauv lub plawv dhia thiab lub stroke ntim vim yog ib tug ua kom tiav khoob ntawm lub plawv los ntawm ib tug quab yuam systolic contraction. Cov chronotropic thiab inotropic cuam tshuam rau lub plawv tau coj los ntawm kev txhawb siab los ntawm cov tshuaj noradrenergic sympathetic nervous system.
Puas mob stroke volume txo nrog kev tawm dag zog?
Kev tawm dag zog . Ntev ntev aerobic qoj ib ce kev cob qhia kuj yuav nce ntxiv stroke ntim , uas feem ntau ua rau qis (so) lub plawv dhia. Txo lub plawv dhia ncua ntev ventricular diastole (filling), nce qhov kawg-diastolic ntim , thiab thaum kawg cia cov ntshav tawm ntau dua.
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