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• W2055791036 abstract "Current Doppler methods have been unreliable in estimating filling pressures in heart transplants. Tissue Doppler imaging is a technique that permits evaluation of myocardial relaxation; combined with transvalvular E velocity, it could improve estimation of these pressures. To investigate this possibility, we evaluated 50 patients by right-sided cardiac catheterization and Doppler echocardiography simultaneously. Their mean ±SD age was 53 ± 15 years and the mean age of donor hearts was 30 ± 12.5 years. The mitral E velocity was combined with the early myocardial relaxation (Ea) velocity by tissue Doppler at the lateral border of the mitral annulus. Likewise, the tricuspid E velocity was combined with Ea at the lateral corner of the tricuspid annulus. Mean wedge pressure related weakly to mitral inflow variables but strongly to E/Ea [r = 0.8; wedge pressure=2.6+1.46(E/Ea)]. In 25 repeat right-sided cardiac catheterizations, changes in mean wedge pressure were well detected by Doppler, with a mean difference of −0.7 ± 3 mm Hg. Mean right atrial pressure related weakly to routine tricuspid inflow variables but strongly to tricuspid E/Ea [r = 0.79; n = 38; right atrial pressure=1.76(E/Ea)−3.7]. In 18 repeat right-sided cardiac catheterizations, changes in mean right atrial pressure were well detected by Doppler, with a mean difference of 0 ± 3.45 mm Hg. Mean wedge pressure and mean right atrial pressure can be estimated in heart transplants with reasonable accuracy using the ratio of E/Ea. Furthermore, this method can accurately track changes in filling pressures." @default.
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• W2055791036 date "1998-08-01" @default.
• W2055791036 modified "2023-10-16" @default.
• W2055791036 title "Estimation of left and right ventricular filling pressures after heart transplantation by tissue Doppler imaging" @default.
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• W2055791036 doi "https://doi.org/10.1016/s0002-9149(98)00346-4" @default.
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