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Low Blood Pressure
URL of this page: https://medlineplus.gov/lowbloodpressure.html

Low Blood Pressure

Also called: Hypotension, LBP
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  • Start Here
  • Diagnosis and Tests

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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

  • Low Blood Pressure (Hypotension) (Mayo Foundation for Medical Education and Research) Also in Spanish
  • Low Blood Pressure (Hypotension) From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Diagnosis and Tests

  • Arterial Catheterization (American Thoracic Society) - PDF
  • Measuring Blood Pressure From the National Institutes of Health (National Library of Medicine) Also in Spanish
  • Tilt Table Test (Mayo Foundation for Medical Education and Research) Also in Spanish

Related Issues

  • Conditions Related to Parkinson's (Parkinson's Foundation)
  • Syncope (Fainting) (American Heart Association)

Specifics

  • Multiple System Atrophy (MSA) (Mayo Foundation for Medical Education and Research) Also in Spanish
  • Orthostatic Hypotension (Postural Hypotension) (Mayo Foundation for Medical Education and Research) Also in Spanish

Genetics

  • Orthostatic hypotension: MedlinePlus Genetics From the National Institutes of Health (National Library of Medicine)

Videos and Tutorials

  • Blood pressure Video (Medical Encyclopedia) Also in Spanish

Clinical Trials

  • ClinicalTrials.gov: Hypotension From the National Institutes of Health (National Institutes of Health)
  • ClinicalTrials.gov: Hypotension, Orthostatic From the National Institutes of Health (National Institutes of Health)

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

  • Article: Midodrine and clinical outcomes in patients on maintenance hemodialysis.
  • Article: An explainable machine learning model for early warning of hypertensive and...
  • Article: Factors associated with hypotension during the first hour of continuous renal...
  • Low Blood Pressure -- see more articles

Find an Expert

  • American Heart Association
  • National Heart, Lung, and Blood Institute From the National Institutes of Health
  • National Institute of Neurological Disorders and Stroke From the National Institutes of Health

Older Adults

  • Fainting (Syncope) (AGS Health in Aging Foundation)
  • Postprandial Hypotension (Merck & Co., Inc.) Also in Spanish

Patient Handouts

  • Low blood pressure (Medical Encyclopedia) Also in Spanish

Topic Image

Low Blood Pressure

MEDICAL ENCYCLOPEDIA

  • Blood pressure
  • Hepatic ischemia
  • Low blood pressure

Related Health Topics

  • Autonomic Nervous System Disorders
  • High Blood Pressure

National Institutes of Health

The primary NIH organization for research on Low Blood Pressure is the National Heart, Lung, and Blood Institute

Disclaimers

MedlinePlus links to health information from the National Institutes of Health and other federal government agencies. MedlinePlus also links to health information from non-government Web sites. See our disclaimer about external links and our quality guidelines.

The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.

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