http://www.onmedc.com/antihypertensive-drugs-and-mechanisms-for-controling-blood-pressure/
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Hypertension mainly defined as a sustained systolic blood pressure of greater than 140 mm Hg or sustained diastolic blood pressure of greater than 90 mm Hg .
http://www.onmedc.com/antihypertensive-drugs-and-mechanisms-for-controling-blood-pressure/