Puas yog kev faib s2 ib txwm?
Puas yog kev faib s2 ib txwm?

Video: Puas yog kev faib s2 ib txwm?

Video: Puas yog kev faib s2 ib txwm?
Video: poj laib hauv koj siab. ntxawm tsab 2024, Lub Xya hli ntuj
Anonim

S2 sib cais tau hnov thaum aortic thiab pulmonic li qub kaw ntawm lub sijhawm sib txawv me ntsis. Normal S2 splitting tuaj yeem hnov ntawm cov neeg uas tsis muaj kab mob plawv. Nco ntsoov nthuav dav ntawm S2 sib cais nrog kev tshoov siab thiab nqaim nrog qhov tas sij hawm hauv cov suab hauv qab no: Normal S2 splitting yog txuam nrog kev tshoov siab.

Ua li no, kev sib cais s2 txhais li cas?

A faib S2 yog ib qho kev tshawb pom ntawm auscultation ntawm lub S2 lub plawv suab. Nws yog tshwm sim thaum kaw lub aortic valve (A2) thiab kaw lub pulmonary valve (P2) tsis synchronized thaum kev tshoov siab.

Ib sab saum toj no, puas yog qhov sib cais s1 ib txwm? Vim tias cov mitral thiab tricuspid li qub ib txwm kaw yuav luag ib txhij, tsuas yog ib lub suab lub suab ib txwm hnov. Txawm li cas los xij, kwv yees li 40% txog 70% ntawm li qub cov tib neeg - nrog rau qee yam mob plawv - " faib S1 "Suab tuaj yeem ua tsaug.

Ib yam nkaus, dab tsi ua rau kev sib cav sib ceg ntawm s2?

Feem ntau ua ntawm paradoxical faib ntawm lub suab thib ob yog sab laug pob ceg thaiv. Obstruction rau sab laug ventricular outflow txaus txaus kom ncua aortic valve kaw kuj tseem yuav ua rau paradoxical splitting.

Puas muaj kev sib cais ntawm s1 thiab s2?

S1 yog ib txwm a ib lub suab vim mitral thiab tricuspid valve kaw tshwm sim yuav luag ib txhij. Lub suab thib ob lub suab ( S2 ) sawv cev rau kev kaw cov semilunar (aortic thiab pulmonary) li qub (point d). S2 yog ib txwm faib vim cov aortic valve (A2) kaw ua ntej cov pulmonary valve (P2).

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