Sudden acceleration of the heartbeat can be caused by a variety of reasons, which can be classified as physiological or pathological, and common diseases include cardiovascular system diseases such as cardiac arrhythmia and heart failure, endocrine system diseases such as hyperthyroidism, and systemic diseases such as fever and severe anemia. 1. Physiological: such as after exercise, nervousness, drinking strong tea, coffee and so on, leading to sympathetic nerve excitation, panic discomfort, generally can be relieved by themselves. 2. Pathologic: (1) cardiovascular system diseases: ventricular premature beats, atrial premature beats, atrial fibrillation, supraventricular tachycardia and other cardiac arrhythmias, the patient usually manifests panic, electrocardiography can usually clarify the type, heart failure, myocardial infarction will also appear compensatory heart rate acceleration. (2) Endocrine system diseases: hyperthyroidism can lead to panic attacks, accompanied by irritability, hyperphagia, thermophobia and other manifestations, usually through the thyroid function tests. (3) Systemic diseases: such as fever, severe anemia can lead to compensatory heart rate. It is recommended that patients with sudden acceleration of heart rate should go to the hospital in time, and reasonable treatment after clarifying the cause of the disease.