Video: Aortic VTI yog dab tsi?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
SV = stroke ntim, VTI = velocity time integral . Cov qauv sib piv rau kev ntsuas hauv aortic cev: sv aorta cov = thaj tsamLVOT • VTI LVOT. Qhov cheeb tsam yog ntsuas hauv cm2. VTI muaj chav tsev cm/kev cog lus thiab qhov ntim mob stroke muaj chav tsev cm3/contraction (piv txwv li ml/contraction).
Ib yam li ntawd, nws raug nug, VTI yog dab tsi hauv echocardiography?
Lub Hom Phiaj: Sab laug ventricular outflow tract velocity time integral (LVOT VTI ) yog txoj hauv kev yooj yim los ntawm Doppler echocardiography txhawm rau xam sab laug ventricular stroke ntim.
Tsis tas li ntawd, Lvot VTI yog dab tsi? Hauv cov neeg noj qab haus huv, cov normal LVOT VTI yog 18 txog 22 cm rau lub plawv dhia (HRs) ntawm 55 thiab 95 neeg ntaus ib feeb. Cov LVOT VTI ( VTI VA) yog ze li ntawm 30 cm, uas, ntawm HR (FC) ntawm 100 tus neeg ntaus ib feeb, qhia tias muaj mob stroke siab thiab lub plawv tawm.
Ua kom pom qhov no, VTI suav li cas?
LVOT VTI yog xam los ntawm kev tso lub pulsed Doppler qauv ntim nyob rau hauv lub outflow ib sab hauv qab lub aortic valve thiab sau cov tshaj tawm (cm / s). Thaum lub teeb liab tshaj tawm tau ua ke nrog kev hwm rau lub sijhawm, cov ntshav sib nrug txav nrog txhua lub systole tau suav hauv cm/systole (Daim duab 1).
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Pom zoo:
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