在酸中毒状态下离体蛙心心率略减慢,但没有显著性差异。心率的减慢与酸浓度的增加无正相关,而心肌收缩力的下降程度与酸浓度的增加呈正相关。10ppm 的亚硒酸钠对离体蛙心的收缩力及心律没有显著性影响,但是,它能减小因酸中毒而引起心收缩力降低的幅度,但不能完全拮抗。 In acidosis state in vitro heart rate slightly slower, but no significant difference. There was no positive correlation between the decrease of heart rate and the increase of acid concentration, but the decrease of myocardial contractility was positively correlated with the increase of acid concentration. Sodium selenite at 10 ppm had no significant effect on contractile force and cardiac rhythm of isolated frog hearts, however, it reduced the magnitude of reduced cardiac contractility due to acidosis but did not completely antagonize it.