Treatment[ edit ] Treatment for reflex syncope focuses on avoidance of triggers, restoring blood flow to the brain during an impending episode, and measures that interrupt or prevent the pathophysiologic mechanism described above. Lifestyle changes[ edit ] The cornerstone of treatment is avoidance of triggers known to cause syncope in that person. However, research has shown that people show great reductions in vasovagal syncope through exposure-based exercises with therapists if the trigger is mental or emotional, e. A technique known as "applied tension" may be additionally useful in those who have syncope with exposure to blood. Sports drinks or drinks with electrolytes may be helpful. People should be educated on how to respond to further episodes of syncope, especially if they experience prodromal warning signs: they should lie down and raise their legs, or at least lower their head to increase blood flow to the brain.
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View All Back To Top Syncope—also known as fainting —is the medical term for a temporary loss of consciousness. Any episode of syncope is important for at least two reasons. First, syncope can cause injury, so it is important to try to prevent it from recurring. And second, syncope can sometimes be a sign of a serious underlying medical problem. While several medical conditions can lead to syncope, by far the most common type of syncope is vasovagal syncope.
While doctors often refer to it as a "simple fainting spell," the mechanism of vasovagal syncope actually is not all that simple. And misunderstanding how vasovagal syncope works can lead to problems in making the correct diagnosis or in choosing adequate treatment.
Dilation of the blood vessels causes a significant proportion of the blood volume to pool in the legs. As a result, the blood pressure will suddenly drop. If the drop in pressure is enough to rob the brain of oxygen, fainting occurs.
In most people with vasovagal syncope, the dilation of blood vessels appears to be the predominant factor that causes loss of consciousness. In some people, however, the slowing of the heart rate plays a major role. Those that occur after you are revived are called "postdromal.
Sudden nausea These prodromal symptoms are followed by a sensation of "graying out," then finally by loss of consciousness. The time between the onset of prodromal symptoms and actually passing out may be a few minutes, or just a second or two. Wait until you feel better before trying to stand. This is because once on the ground, gravity no longer causes the blood to pool in the legs and the blood pressure improves almost immediately.
On the other hand, if the victim is held upright by a well-meaning bystander, the unconsciousness can become very prolonged. This is a potentially dangerous situation because as long as the victim is upright and unconscious, his or her brain is not being adequately perfused with blood.
If you see somebody faint, lay that person on his or her back and elevate the legs about 12 inches above the heart. Loosen any belt, collar, or constrictive clothing. Seek help if the fainting lasts for longer than a few seconds. Postdromal Symptoms After an episode of vasovagal syncope, many people will feel terrible for a few hours or even for the next few days, or even longer. It is particularly important to note that, until these lingering and very annoying symptoms disappear, people are particularly prone to fainting again—so they need to be particularly alert for the warning symptoms that may indicate that an episode of syncope is imminent.
Recurrent Syncope People who have had one or two episodes of vasovagal syncope are frequently able to recognize the warning symptoms, so they will know when another event is about to occur. More importantly, if they do recognize the warning symptoms, they can prevent the blackout simply by lying down and elevating their legs.
Síncope: síncope vasovagal, definición, causas, síntomas y tratamiento
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Síncope vasovagal: síntomas, causas y tratamiento