Figure 3. Effects of thiopental on variables of contractility, (Top left) Effects of thiopental on peak developed force of isometric twitches (DF) and peak isotonic shortening (DL) of isotonic preloaded twitches. (Top right) Effects of thiopental on time to peak force (TPF) and time to half isometric relaxation (RTH) of isometric twitches. (Bottom left) Effects of thiopental on maximal unloaded velocity of shortening (MUVS) and time to MUVS (TMUVS) of zero-load-clamped twitches. (Bottom right) Effects of thiopental on time to peak shortening of isotonic preloaded twitches (TDL). All data are mean plus/minus SD (n = 8). *P < 0.05 and #P < 0.01 for comparison with corresponding control.