Fig. 7. Summarized data for effects of HOE 694 (10 μm) on cell shortening during α^1a-adrenoreceptor activation with phenylephrine (PE; 10 μm) and addition of propofol (30 μm). Results are expressed as percent of baseline value. Control (Ctrl) represents the steady state baseline value for twitch amplitude, set to 100%. *  P < 0.05 compared with baseline value; #  P < 0.05 compared with phenylephrine; **  P < 0.05 compared with phenylephrine plus propofol. n = 15 cells from 7 hearts.