Heart failure classification needs to be based on clinical symptoms, heart failure 8000 is only an indicator, generally can not represent the grade of heart failure. Heart failure 8000 generally refers to the BNP laboratory indicators, BNP reached 8000 generally indicates that the heart function is not good, but can not be used as a diagnostic basis for heart failure grading. The grading of heart failure is generally based on clinical symptoms, and heart function is usually categorized into 4 grades, i.e. grade I-IV. Grade Ⅰ: heart disease patients are not restricted in their daily activities, and general activities do not cause symptoms of heart failure such as fatigue and dyspnea. Grade II: heart disease patients have mild limitation of physical activity, no symptoms when resting, and symptoms of heart failure such as dyspnea, panic, dizziness, etc. may occur during activities. Grade III: Patients with heart disease have obvious limitations in physical activity, and have no symptoms when resting. However, obvious symptoms such as chest tightness and shortness of breath may occur when engaging in light physical activities. Grade IV: Patients with heart disease are unable to engage in any physical activity, and symptoms of heart failure may occur even at rest, and may worsen after activity. If symptoms of heart failure occur, it is recommended to go to the hospital in time for regular treatment.