Fig. (5) Effect exerted by an Amino-Steroid-Anthracenone (ASA; 0.001-100 nM) on Left Ventricular Pressure (LVP) in absence or presence of butoxamine. The results showed that ASA significantly decreased LVP (p = 0.05) in a dose-dependent manner and this effect was not inhibited in presence of butoxamine. Each data points represents the mean ± S.E. of 9 experiments.