If there is an accelerated heartbeat after the lunch break: 1, first of all, the patient should be considered to have cardiogenic diseases, such as coronary heart disease, unstable angina, myocarditis, pericarditis, heart compression, etc., will have tachycardia; 2, for endocrine metabolic diseases, such as hyperthyroidism, hyperadrenocorticism, hyperparathyroidism, there will also be an accelerated heartbeat after the nap; 3, If the patient has a bacterial, viral or other atypical pathogen infection infection, it will lead to tachycardia due to increased body temperature, especially in the afternoon tachycardia is particularly obvious; 4, in addition, if the patient has a previous history of diabetes, in the lunch break there is a hypoglycemic reaction, will also have tachycardia after the lunch break up.