Harish

high blood pressure
High blood pressure, hypertension (a common disorder in which blood pressure remains abnormally high (a reading of 140/90 mm Hg or greater)

blood pressure
the pressure of the blood in the circulatory system, often measured for diagnosis since it is closely related to the force and rate of the heartbeat and the diameter and elasticity of the arterial walls.
What Is Blood Pressure?
Blood pressure is the force of blood against the walls of arteries. Blood pressure is recorded as two numbers—the systolic pressure (as the heart beats) over the diastolic pressure (as the heart relaxes between beats). The measurement is written one above or before the other, with the systolic number on top and the diastolic number on the bottom. For example, a blood pressure measurement of 120/80 mmHg (millimeters of mercury) is expressed verbally as "120 over 80
Normal blood pressure is less than 120 mmHg systolic and less than 80 mmHg diastolic.
Categories for Blood Pressure
Levels in Adults
(Ages 18 Years and Older)
  | Blood Pressure Level (mmHg) |
Category | Systolic |   | Diastolic |
Normal | < 120 | and | < 80 |
Prehypertension | 120-139 | or | 80-89 |
High Blood Pressure   |
Stage 1 Hypertension | 140–159 | or | 90–99 |
Stage 2 Hypertension | 160 | or | 100 |

Legend |
< means LESS THAN |
means GREATER THAN OR EQUAL TO |
When systolic and diastolic blood pressures fall into different categories, the higher category should be used to classify blood pressure level. For example, 160/80 mmHg would be stage 2 hypertension (high blood pressure).