Objective To investigate the effect of Sijunzi Ointment Granule on cardiac function of rats with spleen qi deficiency model.Methods Totally 60 SD rats were randomly divided into normal group, model group, Sijunzi Decoction group, Sijunzi Ointment Granule high group, Sijunzi Ointment Granule medium group, and Sijunzi Ointment Granule low group.The rat model of spleen qi deficiency was prepared by the method of alternate days diet and exhausting swimming and rhubarb solution gavage.The changes of cardiac function in rats were measured by ultrasound diagnostic instrument.The content of brain natr...