What is hypertension?

What is hypertension?  How is it treated?  Below is a primer from a clinical guidelines paper from Weber et al. (2013). Classifying Hypertension Prehypertension: Systolic blood pressure between 120 mm Hg and 139 mm Hg, or diastolic pressures between 80 and 89 mm Hg.  Patients with this condition should not be treated with blood pressure…