The causes of palpitations with normal heartbeat but not high blood pressure include physiologic factors, drug factors, and autonomic dysfunction. 1. Physiological factors can lead to palpitations, such as mental anxiety, nervousness, irritability, staying up late, drinking a lot of strong tea, coffee, alcoholism, heavy smoking, strenuous exercise and so on. 2. Adverse drug reactions can also lead to palpitations with normal heartbeat but not high blood pressure, such as the side effect of palpitations when nebulized terbutaline sulfate is administered, and the use of atropine and ephedrine may also cause such adverse reactions. 3. Palpitations due to autonomic dysfunction in cardiac neurosis, menopause, etc., but the blood pressure and heart rate are within normal limits. When frequent palpitations occur, but the blood pressure and heart rate are normal, it is necessary to consult a doctor in time and under the guidance of the doctor’s reasonable diagnosis and treatment.