Heartburn is a feeling of discomfort in the precordial area, caused by rapid or slow heartbeat or arrhythmia. In healthy people, panic often occurs during mood swings, stress, shock, physical exercise, heavy physical labor, smoking, drinking alcohol, strong tea, coffee, etc. The causes of pathological panic include heart disease, hyperthyroidism, fever, anemia, acute bleeding and so on. However, although panic is a common clinical symptom of arrhythmia, some cases of panic are not necessarily arrhythmias. The most common one is heart beat enhancement, normal people can feel panic when their heart beat is enhanced after strenuous physical activity or mental excitement, strong tea, coffee and taking ephedrine, caffeine adrenaline and other drugs; ventricular hypertrophy, anemia, fever, hyperthyroidism and other diseases that cause increased cardiac output can cause panic. In addition, patients with cardiac neurosis caused by plant nerve dysfunction also have panic attacks.