It is known that the vagus nerve and sympathetic nerve innervate the heart together and regulate its activity from opposite directions, adapting to the overall activity of the body. The dual autonomic innervation of the heart follows the characteristics of nervous innervation, i.e. both the vagus nerve and sympathetic nerve are in a state of excitement and are able to continuously issue tension impulses to regulate the heart. When the two counteract each other to reach equilibrium, this is reflected in the resting heart rate. When the patient wakes up, the vagus nerve is in a state of inhibition and the sympathetic nerve is in a state of excitation, then the sympathetic excitation can lead to increased myocardial contraction and faster heart rate, and the conduction speed will also be accelerated, and the heart will feel very strong at this time.