Figure 1. Effects of intravenous anesthetics on atrial conduction velocity (CV) and atrial effective refractory period (ERP). Shown are concentration-response curves demonstrating the effects of anesthetics on (A) atrial conduction velocity (CV) and (B) atrial effective refractory period (ERP) in isolated atrial trabeculae. Each point represents a mean +/-SEM of 5 experiments for the propofol and thiopental groups and of 4 experiments for the ketamine group. *P < 0.05 indicates a significant difference from control.