Hypertension classification and risk assessment

Hypertension is classified into three grades, the first grade is systolic blood pressure and diastolic blood pressure exceeding the normal value of 10mmHg, the second grade systolic blood pressure and diastolic blood pressure are higher than the normal blood pressure value of 20-30mmHg, and the third grade hypertension systolic blood pressure ≥180mmHg, diastolic blood pressure ≥110mmHg. Long-term blood pressure is easy to cause brain diseases, cardiovascular diseases and lung diseases.