Hypertensive:

Definition: [n] a common disorder in which blood pressure remains abnormally high (a reading of 140/90 mm Hg or greater) 
Synonyms: high blood pressure 
Antonyms: hypotension 
When the blood flows through the vessels at a greater than normal force. High blood pressure strains the heart; harms the arteries; and increases the risk of heart attack, stroke, and kidney problems.