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- W2464653996 abstract "Multidimensional left atrial (LA) performance indices have not been extensively studied in chronic mitral valve disease. LA maximal volume, stroke volume (LA volume at atrial systole minus LA minimal volume), LA ejection fraction (stroke volume/volume at atrial systole) and A-wave velocity, were measured in 14 patients with mitral stenosis (mean mitral valve area 1.5 cm2); 14 patients with chronic mitral regurgitation all in sinus rhythm; and were compared to 20 age and sex matched normal control subjects using biplane transthoracic echo and pulsed Doppler. Although LA volumes--maximal and at onset of atrial systole--were greater in mitral regurgitation and mitral stenosis (p < 0.01) compared to normal subjects, LA ejection fraction was not statistically different among the three groups. LA stroke volume was greater in mitral regurgitation and mitral stenosis compared to normal subjects, p < 0.01. LA kinetic energy (LAKE) = 1/2 mv2 (m = LA stroke volume x 1.06, blood's specific gravity, v = A wave velocity) was increased in mitral stenosis and mitral regurgitation compared to normal subjects (p < 0.001). An inverse correlation (r = 0.66, p < 0.01) was present between LAKE and mitral valve area in mitral stenosis. It is concluded that LA function, a complex interplay of multiple factors, requires multidimensional methods of analysis beyond standard measurements of size and volume, which provide additional insight into normal LA function, and better definition of LA function changes involved in the natural history of chronic mitral valve disease." @default.
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- W2464653996 date "1995-10-01" @default.
- W2464653996 modified "2023-09-27" @default.
- W2464653996 title "Left atrial performance indices in chronic mitral valve disease." @default.
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