The appearance of heart tremor, fibrillation, a symptom that can be self-conscious discomfort, if it is physiological does not belong to the disease, if it is pathological may be arterial ductus arteriosus, aortic valve closure insufficiency, anemia and other diseases. 1. Physiological: it can occur in healthy people when they have strenuous activities, mental stress, drinking strong tea or coffee, applying certain drugs (such as atropine, thyroid tablets, caffeine, etc.), which does not belong to the disease, and it can be recovered after improving the life style and stopping the drugs. 2. Pathologic: It can occur in certain heart diseases or systemic diseases. Common heart diseases include hypertensive heart disease, arterial duct failure, aortic valve insufficiency, etc. Other systemic diseases are commonly seen in hyperthyroidism, hypoglycemia, anemia, pheochromocytoma, etc. In addition, a variety of arrhythmias lead to cardiac arrhythmia, which is not a disease. In addition, tachycardia and bradycardia caused by various cardiac arrhythmias can occur. For the occurrence of the above manifestations need to actively seek medical treatment to find the cause of the disease, so as not to delay the treatment of the disease.