How does the blood pressure reading indicate high blood pressure?

Question
Hello doctor,
I measure my blood pressure and my reading is 171/111. Doctor let me ask how the blood pressure reading indicates high blood pressure? Thanks for the advice doctor.
Ho Nguyen Hoang Bao (1994)
Reply
Hello,
To the question “How does the blood pressure index warn of high blood pressure? , please answer as follows:
The European Society of Cardiology and Blood Pressure (ESC/ESH) classification of hypertension in 2018 is as follows:
Optimal blood pressure: Systolic blood pressure < 120 mmHg and blood pressure diastolic < 80 mmHg. Normal blood pressure: Systolic blood pressure 120-129 mmHg and/or diastolic blood pressure 80-84 mmHg. High-normal blood pressure: Systolic blood pressure 130-139 mmHg and/or diastolic blood pressure 85-89 mmHg. Grade 1 hypertension: Systolic blood pressure 140-159 mmHg and/or diastolic blood pressure 90-99 mmHg. Grade 2 hypertension: systolic blood pressure 160-179 mmHg and/or diastolic blood pressure 100-109 mmHg. Grade 3 hypertension: systolic blood pressure ≥ 180 mmHg and/or diastolic blood pressure ≥ 110 mmHg. Isolated systolic hypertension: Systolic blood pressure ≥ 140 mmHg and diastolic blood pressure < 90 mmHg. Your blood pressure reading is 171/111 mmHg, you need to pay special attention and see a specialist for direct advice because you are likely to have grade 2 hypertension. You can go to a medical facility or hospital under Vinmec Health System for the best examination and advice. Thank you for trusting and asking questions to Vinmec. Wish you health.
Best regards!