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Online Medical Symptom Checker  Symptoms & Signs Index
To lose consciousness because of a temporary decrease in the blood supply to the brain.
Medical terms related to fainting :
Blackout, Syncope, Lightheadedness, Passed out, Vasovagal faint
Common causes of fainting: 
o Low Blood Pressure
o Dehydration
o Aortic Stenosis
o Migraine Headache
o Diabetes
o Stroke
o High altitude
o Blood drawing
o Urinating (micturition syncope)
o Defecating (defecation syncope)
o Swallowing (swallowing syncope)
o Coughing (cough syncope)
Pulmonary Hypertension:
High blood pressure in the arteries supplying the lungs.
o Abnormal heart rhythms (heart beating too fast or too slow)
o Medications can cause fainting by altering blood pressure
o Postural (orthostatic) hypotension: Drop in blood pressure due to changing body position to a more vertical position after lying or sitting

Other Causes of fainting:
o Widespread disease of the heart muscle (cardiomyopathy)
o Pulmonic valve stenosis
o Aortic valve Stenosis
Parkinson's Disease:
A chronic progressive neurological disease that is linked to decreased dopamine production in the substantia nigra and is marked especially by resting tremor, rigidity, slowness of movement, impaired balance, and a shuffling gait;called also paralysis agitans, parkinsonian syndrome, parkinsonism, Parkinson's, Parkinson's syndrome.


Call 911 or go to the hospital if fainting is accompanied by: 
o Felling from a height
o Prolonged loss of consciousness
o Pregnancy
o Diabetes
o Chest pain, pressure, or discomfort
o pounding or irregular heartbeat
o Loss of speech, visual disturbances, or inability to move
o Convulsions, tongue trauma, or loss of bowel control

Diagnostic tests that may be performed include: 
o Holter monitor
o X-ray of the chest
o Echocardiogram

Prevention and self-care: 
Immediate treatment for someone who has fainted includes:
o Checking the person's airway and breathing.
o If necessary, call 911 and begin rescue breathing and CPR.
o Loosening tight clothing around the neck.
o Keeping the affected person lying down for at least 10 - 15 minutes
o Elevating the feet above the level of the heart (about 12 inches)
o If vomiting has occurred, turning the person onto one side to prevent choking
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Diagnosis of fainting, Reasons of fainting, Prevention of fainting, Definition of fainting, Treatments for fainting

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