Essential hypertension classification criteria

Essential hypertension classification standard, grade I hypertension refers to systolic blood pressure 140-159 mm Hg, diastolic blood pressure 90-99 mm Hg, grade II hypertension refers to systolic blood pressure 160-179 mm Hg, diastolic blood pressure 100-109 mm Hg, grade III hypertension refers to systolic blood pressure 180 mm Hg and above, diastolic blood pressure 110 mm Hg and above.