Figure 6. Summarized data for the effect of ketamine on time to peak (Tp) and time to 50% recovery (Tr) for myocyte shortening and [Ca2+]i. Changes in timing were measured in milliseconds and were normalized to changes in peak amplitude. Values represent means +/- SEM. *Significant change from control (P < 0.05); n = 18 cells per 5 hearts.