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Intermountain Heart Institute at Intermountain Medical Center

(801) 507-4701Map5121 S. Cottonwood StreetMurray, UT 84107

Passing out describes partial or complete loss of consciousness with interruption of awareness of oneself and one's surroundings.

What to Do

  • If you are aware that a fainting spell is coming, sit with your head between your knees for a moment or two to increase the flow of oxygen to the brain.
  • If you are experiencing blackouts, call your doctor for evaluation.

Passing Out in Depth

Learn more about passing out from Intermountain's Patient Education Library:

Common Causes

Blackouts — especially when combined with other symptoms — can signal serious conditions, such as heart failure, high blood pressure, or heart rhythm problems. Fainting can also be a sign of less serious conditions, such as fatigue, anemia, hunger, or prolonged standing.

  • Heart Failure

    Heart failure is a condition in which the heart can't pump enough blood to meet the body's needs.

  • High Blood Pressure

    In high blood pressure, the force of blood pushing against the walls of the arteries is too high. Over time, high blood pressure can damage the body in many ways.

  • Irregular Heartbeat (Arrhythmias)

    An irregular heartbeat (arrhythmia) is a problem with the rate or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm.

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