Definition:

Also known as fainting and "passing out", syncope is an abrupt, yet temporary loss of consciousness due to a fall in blood pressure.  Causes include stress, pain, dehydration, exhaustion, sweating, heart disorders, metabolic disorders, and lung disorders.

Symptoms:

• Dizziness
• Nausea
• Headache
• Abnormal heart rhythm (arrhythmias)
• Hypotension 
• Numbness
• Blurry vision
• Confusion
• Difficulty speaking
• Loss of movement

Diagnosis:

• Tilt table test - to test for a drop in heart rate and blood pressure
• Echocardiography
• Stress test
• Holter monitor
• Cardiac catheterization
• CT scan - to check for possible neurologic causes 

Treatment:

• Roll onto back and keep airway open
• Raise legs above head and loosen up clothing 
• Initiate CPR if breathing and pulse weak or not present