Effects of propranolol on the ELT-induced increase in atrial dynamics. (A) Effects of ELT on the atrial pulse pressure (a), and stroke volume (b). Data were from Figure 2A. (B) Effects of ELT in the presence of propranolol on the same parameters (a, b). The values (C[a, b]) are expressed as percent difference over the mean values before the addition of ELT. Number of experiments: ELT (0.3 mg/mL), n=6; propranolol (1 μM)+ELT (0.3 mg/mL), n=4; propranolol control, n=3. *P<.001 vs. control period; #P<.01 vs. the values before the addition of ELT; ++P<.001 vs. control period; $P<.001 vs. control group; &P<.001 vs. control group.