If patients experience sudden heart twitching, the following factors should be taken into account: 1. Patients with cardiac neurosis can suffer from sudden heart twitching accompanied by pain due to nerve dysfunction when there is a disorder of the vegetative nerves. 2. For cardiogenic diseases, such as unstable angina pectoris in coronary atherosclerotic heart disease, myocarditis, pericarditis, valvular disease of the heart, hypertrophic obstructive cardiomyopathy, dilated For respiratory system diseases, such as acute lung infection, pulmonary heart disease, pulmonary hypertension, pleurisy, and pneumothorax, these conditions may also cause the above clinical symptoms. 4. throbbing pain.