American Journal of Physiology–Heart and Circulatory Physiology 293(3), H1473–H1479 (2007), DOI 10.1152/ajpheart.00208.2007. Abstract: six sheep, implanted ventricular and annular markers, biplane fluoroscopy and three-dimensional marker reconstruction; tetrahedral volume estimates separate annular dynamics from total filling. Indexed first byline is C Carlhäll; no expansion of the initial is asserted.