Conduction velocity. Conduction velocity (CV) in tissue strips from the right ventricle of ZDL and ZDF rats under control conditions (black lines) or treatment with the anti-arrhythmic peptide AAP10 (50 nmol/L) (red lines). Treatment was started at 20 min as indicated by the gray shaded area in the figure. The dashed line indicates the average CV during the last 10 min of the baseline period in ZDL rats. Mean and SEM values for each group and period are shown in Table 1.