Heart ultrasound is normal but recurrent palpitations, can not determine whether treatment is needed, may be due to arrhythmia, cardiac dysfunction, hyperthyroidism, physiological factors and other reasons, if caused by disease need to be treated. 1. Arrhythmia: Mild sinus bradycardia, sinus arrhythmia, etc. may have no obvious clinical manifestations. More serious arrhythmias such as sick sinus syndrome, rapid atrial fibrillation, paroxysmal supraventricular tachycardia, sustained ventricular tachycardia, etc. can cause palpitations, chest tightness, dizziness, low blood pressure, sweating, and in severe cases, fainting, A.S. syndrome and even sudden death. Cardiac ultrasound alone cannot determine the presence of arrhythmia, and further examination of electrocardiogram and 24-hour ambulatory electrocardiogram can be used to help diagnose. According to the corresponding factors, the patient should be treated with medication such as metoprolol tartrate, radiofrequency ablation and other surgical methods. 2. Cardiac dysfunction: In clinical practice, cardiac dysfunction is mainly manifested by symptoms related to cardiovascular diseases, such as chest tightness, dyspnea, panic, chest pain and so on. Its treatment is mainly based on psychotherapy, supplemented by antidepressants, such as oxazepam and lorazepam. 3. Hyperthyroidism: patients with hyperthyroidism may also have panic attacks and palpitations, at this time, the patient’s echocardiogram does not necessarily have organic changes, therefore, it is recommended that the patient review the thyroid ultrasound, thyroid function of the five to rule out the diagnosis. 4. Physiological factors: Under certain physiological factors, such as drinking alcohol, coffee, staying up all night, mental stress, etc., it will lead to sympathetic nerve excitation, which will lead to palpitations. If there is no history of organic heart disease, there is no need for special treatment, and the symptoms will improve after adjusting the daily routine and mood. There are many causes of palpitations, and patients need to be thoroughly examined to rule out a diagnosis, so consult a medical professional for specific advice.