High blood pressure causes

Blood pressure defined as force on arteries measured in milli meters of mercury (mm Hg). Normal B.P. is 120/80 mm Hg. High blood pressure or arterial hypertension is chronic medical condition in which artery force is elevated and depends on heart muscle contraction or relaxation. High blood pressure affect kidneys, arteries, heart or endocrine system and leads to hypertensive heart disease and coronary artery disease, stroke if not treated. Blood pressure tends to rise with age.