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Fainting

• Overview
• Treatment

Alternative Names:

Passed out; Lightheadedness - fainting; Syncope; Vasovagal

Home Care:

If you have a history of fainting and have been seen by a medical professional, follow your doctor's instructions for how to prevent fainting episodes. For example, if you know the situations that cause you to faint, avoid or change them. Avoid sudden changes in posture. Get up from a lying or seated position slowly. If having blood drawn makes you faint, tell your health care provider before having a blood test and make sure that you are lying down when the test is done.

You can take immediate treatment steps when someone has fainted:

• Check the person's airway and breathing. If necessary, call 911 and begin rescue breathing and CPR.
• Loosen tight clothing around the neck.
• Keep the person lying down for at least 10 - 15 minutes, preferably in a cool and quiet space. If this is not possible, sit the person forward and place their head between their knees.
• If vomiting has occurred, turn the person onto their side to prevent choking.
• Raise the person's feet above the level of the heart (about 12 inches).

Call your health care provider if:

Call 911 if the person who fainted:

• Fell from a height, especially if injured or bleeding
• Does not become alert quickly (within a couple of minutes)
• Is pregnant
• Is over age 50
• Has diabetes (check medical identification bracelets)
• Feels chest pain, pressure, or discomfort
• Has a pounding or irregular heartbeat
• Has a loss of speech, visual disturbances, or inability to move one or more limbs
• Has convulsions, tongue injury, or loss of bowel control

Even if it's not an emergency situation, people should be seen by a doctor if they have never fainted before, if they are fainting frequently, or if they have new symptoms associated with fainting. Call for an appointment to be seen as soon as possible.

What to expect at your health care provider's office:

When you see your doctor, the focus of the questions will be to determine whether you simply fainted, or if something else happened (like a seizure), and to figure out the cause of the fainting episode.

The questions will include:

• How would you describe the dizziness that you felt before fainting? Did you feel light-headed, off-balance, or like the room was spinning?
• Was the faint associated with convulsions (jerking muscle movements), tongue trauma, or loss of control of your bowels?
• When you regained consciousness were you aware of your surroundings or were you confused?
• Did you experience chest pain or heart palpitations when you fainted?
• Is this the first time you fainted?
• When did you faint? What were you doing before it occurred? For example, were you going to the bathroom, coughing, or standing for a long time?
• Does fainting occur when you change positions -- for example, go from lying to standing?

The physical examination will focus on your heart, lungs, and nervous system. Your blood pressure may be measured in several different positions.

Tests that may be performed include:

• ECG
• Holter monitor
• X-ray of the chest
• Echocardiogram
• EEG

References:

American College of Emergency Physicians. Clinical policy: critical issues in the evaluation and management of patients presenting with syncope. Ann Emerg Med . 2001; 37(6): 771-776.

Marx J. Rosen’s Emergency Medicine: Concepts and Clinical Practice . 5th ed. St. Louis, Mo: Mosby, Inc; 2002.

Ganzeboom KS. Prevalence and triggers of syncope in medical students. Am J Cardiol . 2003; 91(8): 1006-1008, A8.

• Review Date: 5/17/2007
• Reviewed By: Benjamin W. Van Voorhees, MD, MPH, Assistant Professor of Medicine, Pediatrics and Psychiatry, The University of Chicago, Chicago, IL. Review provided by VeriMed Healthcare Network.

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