All are effects of sympathetic stimulation except
Stimulation of the sympathetic cardiac nerves speeds the depolarizating effect of IH and the rate of spontaneous discharge increasesThis is possible by decrease in the refractory period Ref: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:492
Increased conduction velocity
Increased hea rate
Increased refractory period
Increaed contractility of hea
Cardiovascular system