Fig. 6.
Average values of work (A), heat (B), and mechanical efficiency (C) of trabecula as functions of relative afterload. Data were fitted using third-order polynomials, constrained to intersect the abscissae at relative afterloads of 0 and 1. B: average heat per twitch as a function of relative afterload, fitted using linear regression. #Statistical significance was detected between the Dahl/SS and SS-13BN groups. Insets show data from a representative Dahl-LS trabecula. Average peak work output (D) and peak mechanical efficiency (F) for each of the 4 groups are shown. E: work-loop activation heat output, calculated from the intercept of the heat-relative afterload relationship (B). Values are means ± SE. *Statistical significance was found between the Dahl-HS and SSBN-HS groups.