At present, a grading scheme proposed by the New York Heart Association (NYHA) in 1928 is mainly used, mainly based on the patient’s conscious ability to move into four classes: Class I Patients with heart disease, but the amount of activity is not restricted, and the usual general activities do not cause fatigue, palpitations, dyspnea or angina pectoris. Han Zhenggui, Emergency Department, Sanya Traditional Chinese Medicine Hospital Grade II Patients with heart disease are mildly restricted in physical activity and have no conscious symptoms at rest, but fatigue, palpitations, dyspnea or angina can occur with general physical activity. Grade III Patients with heart disease are significantly limited in physical activity, with less than usual general activity causing the above symptoms. Class IV Patients with heart disease are unable to engage in any physical activity. Symptoms of heart failure appear at rest and worsen with physical activity.