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Low Blood Pressure

Also called: Hypotension, LBP

Summary

You've probably heard that high blood pressure is a problem. Sometimes blood pressure that is too low can also cause problems.

Blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps out blood into the arteries. Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure. When your heart is at rest, between beats, your blood pressure falls. This is the diastolic pressure. Your blood pressure reading uses these two numbers. Usually they're written one above or before the other, such as 120/80. If your blood pressure reading is 90/60 or lower, you have low blood pressure.

Some people have low blood pressure all the time. They have no symptoms and their low readings are normal for them. In other people, blood pressure drops below normal because of a medical condition or certain medicines. Some people may have symptoms of low blood pressure when standing up too quickly. Low blood pressure is a problem only if it causes dizziness, fainting or in extreme cases, shock.

NIH: National Heart, Lung, and Blood Institute

Start Here

  • (American Heart Association)
  • (Mayo Foundation for Medical Education and Research)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Symptoms

  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Diagnosis and Tests

  • (American Thoracic Society) - PDF
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)
  • (Mayo Foundation for Medical Education and Research)

Prevention and Risk Factors

  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Treatments and Therapies

  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Living With

  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Related Issues

  • (Parkinson's Foundation)
  • (American Heart Association)
  • (UpToDate)

Specifics

  • (Mayo Foundation for Medical Education and Research)
  • From the National Institutes of Health (National Institute of Neurological Disorders and Stroke)
  • From the National Institutes of Health (National Institute of Neurological Disorders and Stroke)
  • (Mayo Foundation for Medical Education and Research)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Genetics

  • From the National Institutes of Health (National Library of Medicine)

Videos and Tutorials

Clinical Trials

  • From the National Institutes of Health (National Institutes of Health)
  • From the National Institutes of Health (National Institutes of Health)

Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

Find an Expert

  • From the National Institutes of Health
  • From the National Institutes of Health Also in

Seniors

  • (AGS Foundation for Health in Aging)
  • (Merck & Co., Inc.)

Patient Handouts

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