OverviewHypertension is a disorder characterized by consistently high blood pressure. Generally, high blood pressure consists of systolic blood pressure (the "top" number, which represents the pressure generated when the heart beats) higher than 140, or diastolic blood pressure (the "bottom" number, which represents the pressure in the vessels when the heart is at rest) over 90.
Update Date 11/25/2014
Updated by: Robert Hurd, MD, Professor of Endocrinology and Bioethics at Xavier University, Cincinnati, Ohio. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.