Any adult who is over 20 years of age, and who has a Systolic Blood Pressure of equal or more
than 140 mm of mercury and a diastolic BP of equal or more than 90 mm of mercury on two separate
occasions when recorded in a relaxed sitting position is considered hypertensive.
A Systolic Blood Pressure between 120 to 139 or Diastolic Blood Pressure between 80 to 89 is
considered pre-hypertensive and requires to be monitored for hypertension in the future. American Heart Association in 2018 has classified systolic blood pressure between 130 to 140 and diastolic blood pressure between 80 to 89 as stage I hypertension.
