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- W1984480319 abstract "meanMV gradient before exercise was 1.35± 0.05mmHg and increased to 4.00± 0.16mmHg post-stress (p< 0.001). This represented a 196% increase in the gradients. In the last 40 patients, the left ventricular outflow tract (LVOT) velocity profiles were also measured, as an indicator of increased cardiac output with exertion. The LVOT mean gradient increased from 2.3± 0.74mmHg to 4.1± 1.72mm Hg (p< 0.001). This was only a 78% increase in these gradients. Conclusion: This study provides a normal range for the effect of exercise on normal mitral valve gradients. Additionally, trans-mitral valve gradients increased substantially more than the LVOT stroke volume (i.e. cardiac output). These data suggest that the mitral valve apparatus acts as a sphincter with exercise, becoming relatively stenotic, out of proportion to increases in cardiac output." @default.
- W1984480319 created "2016-06-24" @default.
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- W1984480319 date "2010-01-01" @default.
- W1984480319 modified "2023-09-26" @default.
- W1984480319 title "The Utility of Three-dimensional Transoesophageal Echocardiography in the Assessment of Prosthetic Para-valvular Regurgitation" @default.
- W1984480319 doi "https://doi.org/10.1016/j.hlc.2010.06.483" @default.
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