AI Article Synopsis
- The study investigated the interaction between the mitral valve (MV) and tricuspid valve (TV) in healthy children, as previous research largely focused on adults or individual valves without considering their relationship.
- Real-time 3D echocardiography was used to analyze various aspects of valve motion in 17 children aged 3-15, revealing that the MV area increased during systole while the TV area decreased, with the TV showing a greater reduction in diameter.
- The study concluded that the differences in MV area change compared to adults may be due to the compliant myocardium in children, with notable bending motion in both valves during early diastole, indicating a connection with ventricular forces.
Article Abstract
Background: Although there are animal or adult studies analyzing annular motion of the mitral valve (MV) or tricuspid valve (TV) separately, there are no data analyzing interaction between the MV and TV, or data from the pediatric population.
Methods: A total of 17 healthy children (age 3-15 years) were enrolled in this study. Using real-time 3-dimensional echocardiography, annular area, perimeter, segmental diameter, and bending angle were obtained and analyzed.
Results: MV area increased during systole, in contrast to TV area, which decreased. TV area demonstrated a greater reduction of lateral diameter during systole. Bending motion became most acute in early diastole, which was greater for the TV.
Conclusions: MV area change differs from adults, which may be explained by a more compliant myocardium in children. Greater lateral forces on TV prevent it from becoming circular, thus, preserving valve competency. Both valves show a bending motion, which becomes most prominent during isovolumic relaxation continuing into early diastole for the TV, suggesting a relationship with torsional forces within the ventricles.
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| http://dx.doi.org/10.1016/j.echo.2005.01.014 | DOI Listing |
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