Effects of ISO on intracellular Ca transients, relaxation time 80% (RT80%), and diastolic Ca. A, Original Ca tracings showing the clear positive inotropic effects of ISO in WT and the diminished effects in TG. Average values for intracellular Ca transient amplitudes (B), relaxation (C), and diastolic Ca (D). *Significant different values versus baseline using Student-Newman-Keuls post hoc test. #Significant difference versus corresponding value of WT using ANOVA.