Longitudinal motion of the atrioventricular annuli in children: reference values, growth related changes, and effects of right ventricular volume and pressure overload.
Arce OX, Knudson OA, Ellison MC, Baselga P, Ivy DD, Degroff C, Valdes-Cruz L. Longitudinal motion of the atrioventricular annuli in children: reference values, growth related changes, and effects of right ventricular volume and pressure overload. J Am Soc Echocardiogr. 2002 Sep; 15(9):906-16.