MauriceGarfield39 Blood pressure is the pressure of blood versus the walls of arteries. Blood pressure is examined in 2 terms as systolic pressure and diastolic stress. A blood pressure measurement of 120/80 mmHg (millimeters of mercury) is shared vocally as "120 over 80." Normal blood pressure is 120/80 mm Hg. Blood stress more than this 120/80 mm is labelled as hypertension. High blood pressure prevails. Almost 65 million Americans are getting treated for this condition. African Americans are more prone to high BP. Often obese, those with family history of high blood pressure, and those with pre-hypertension inclines to Hypertension.