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High blood pressure (hypertension)


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High blood pressure, or hypertension, is a condition in which the force of blood against artery walls is too strong. Over time, high blood pressure can damage the arteries, heart, and kidneys and can lead to heart disease and stroke.

High blood pressure can be treated effectively with lifestyle changes and medications that can reduce the risk of complications.

Blood pressure readings consist of an upper number and a lower number (such as 120 over 90 or 120/90). The upper number is systolic blood pressure; the lower number is diastolic blood pressure. Blood pressure readings are measured in units called millimeters of mercury (mm Hg). Normal blood pressure is 119 mm Hg systolic over 79 mm Hg diastolic or below.

A person has high blood pressure (hypertension) when either or both of the following are present:

  • The top number (systolic) is 140 mm Hg or higher.
  • The bottom number (diastolic) is 90 mm Hg or higher.

Credits

AuthorJeannette Curtis
AuthorCaroline Rea, RN, BS, MS
EditorKathleen M. Ariss, MS
EditorSusan Van Houten, RN, BSN, MBA
Associate EditorTracy Landauer
Associate EditorPat Truman, MATC
Primary Medical ReviewerPatrice Burgess, MD

- Family Medicine
Primary Medical ReviewerAdam Husney, MD

- Family Medicine
Primary Medical ReviewerKathleen Romito, MD

- Family Medicine
Last UpdatedMay 25, 2007

Last Updated: May 25, 2007
Author:
Jeannette Curtis

Caroline Rea, RN, BS, MS
Medical Review:
Patrice Burgess, MD - Family Medicine

Adam Husney, MD - Family Medicine

Kathleen Romito, MD - Family Medicine


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