what causes vasovagal syncope
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- Vasovagal syncope (also called cardioneurogenic syncope) is a condition in which temporary loss of consciousness is caused by a neurological reflex that produces either sudden dilation of the blood vessels in the legs, or a very slow heart rate (bradycardia), or both.
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Collapse, Fainting, Syncope â Definition, Causes, Symptoms and Treatment Syncope may occur due to heart disease like valvular heart disease, myocardial infarction or arrhythmia. The heart beats too fast, too slowly or too irregularly, in all these cases, the blood supply to the brain is temporarily restricted. Especially in the elderly, breaks called “black veil” occasionally occur.
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- The common reason behind each syncopal or fainting episode is a temporary lack of oxygen-rich (red) blood getting to the brain. However, many different problems can cause a decrease in blood flow to the brain. Vasovagal syncope. This is the most common type of syncope.
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Syncope and Its Causes Two general types of heart problems can produce syncope -- heart problems that obstruct the flow of blood through the heart, and cardiac arrhythmias. An obstruction to the blood flowing through the heart can cause a drop in the amount of blood being pumped by the heart, thus robbing the brain of sufficient blood flow.
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- The vagus nerve is involved in one of the most common causes of fainting, called vasovagal syncope. This is an overreaction of the body to certain stimuli, like the sight of blood, which involves the stimulation of the vagus nerve. This stimulation causes a drop in blood pressure and heart rate.
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Understanding Fainting -- the Basics Fainting is a common problem, accounting for 3% of emergency room visits and 6% of hospital admissions. It can happen in otherwise healthy people. A person may feel faint and lightheaded (presyncope) or lose consciousness (syncope). What Causes Fainting? Fainting may have a variety of causes. A simple episode, also called a vasovagal attack or neurally-mediated syncope, is the most common type of fainting spell. It is most common in children and young adults. A vasovagal attack happens because blood pressure drops, reducing circulation to the brain and causing loss of consciousness.
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Vasovagal syncope Of the 9 causes of Vasovagal syncope that we have listed, we have the following prevalence/incidence information: 1  0 causes are very common diseases. 2  0 causes are common diseases. 3  0 causes are uncommon diseases. 4  0 causes are rare diseases. 5  0 causes are very rare diseases.
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Vasovagal (Neurocardiogenic) Syncope 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.
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Reflex syncope Vasovagal syncope occurs in response to a trigger, with a corresponding malfunction in the parts of the nervous system that regulate heart rate and blood pressure.reatment for vasovagal 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. 1  The cornerstone of treatment is avoidance of triggers known to cause syncope in that person.
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Reflex syncope Vasovagal syncope. Not to be confused with Vagovagal reflex. A vasovagal syncope, vasovagal episode or vasovagal response also called a neurocardiogenic syncope is a malaise mediated by the vagus nerve. Vasovagal syncope is the most common type of fainting. Vasovagal syncope is most commonly found in adolescents and in older adults.
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Vasovagal syncope Your doctor may recommend tests to rule out more serious causes of fainting, such as heart disorders. Symptoms Before you faint due to vasovagal syncope, you may experience some of the following:
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- Vasodepressor syncope: The temporary loss of consciousness in a particular kind of situation. (Syncope is temporary loss of consciousness or, in plain English, fainting). The situations that trigger this reaction are diverse and include having blood drawn, straining while urinating or defecating or coughing. The reaction also can be due to the emotional stress of fear or pain.
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Headache and Slurred speech Symptom Checker A vasovagal attack is associated with a number of common symptoms related to a lack of blood flow to the brain. Examples include: 1  Blurred or double vision. 2  Cold skin. 3  Difficulty breathing. 4  Disorientation. 5  Fainting, change in level of consciousness, or lethargy. 6  Headache. 7  Irregular heart beat. 8  Nausea with or without vomiting.
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The Misdiagnosis of Epilepsy It appears that two specific causes of syncope are most commonly misdiagnosed as epilepsy in children and young adults: vasovagal syncope and long-QT syndrome. Vasovagal syncope (also called the simple fainting spell) occurs due to a reflex often triggered by pain, fright, an upset stomach, or many other things.
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- Symptoms. Before you faint due to vasovagal syncope, you may experience some of the following: Pale skin; Lightheadedness; Tunnel vision — your field of vision narrows so that you see only what's in front of you; Nausea; Feeling warm; A cold, clammy sweat; Yawning; Blurred vision; During a vasovagal syncope episode, bystanders may notice: Jerky, abnormal movements
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- Vasovagal syncope: common cause of fainting. See detailed information below for a list of 9 causes of Vasovagal syncope, Symptom Checker, including diseases and drug side effect causes.
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Syncope (Fainting) What causes syncope? It may be caused by emotional stress, pain, pooling of blood in the legs due to sudden changes in body position, overheating, dehydration, heavy sweating or exhaustion. Syncope may occur during violent coughing spells (especially in men) because of rapid changes in blood pressure.
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How is fainting (syncope) diagnosed? Heart structural conditions. Structural problems with the heart can cause fainting or syncope, either because there is a problem with the ability of the heart to adequately pump blood or because of valve problems. When the heart muscle becomes damaged or inflamed it may not have the ability to pump blood to meet the body's needs.
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Blackout The list of medical condition causes of Syncope (Blackout) includes: Some possible causes of fainting or loss of consciousness include: Fainting. Alcohol on an empty stomach (see Alcohol use) Vasovagal attack. Heatstroke.
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Vasovagal syncope Research the causes of these symptoms that are similar to, or related to, the symptom Vasovagal syncope: 1  Exertion. 2  Such as straining on the toilet. 3  Fear of bodily injury.  Having blood 1  drawn. Heat exposure.  Standing for long periods of 1  time. The sight of 2  blood. more symptoms...».
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- A vasovagal syncope, vasovagal episode or vasovagal response also called a neurocardiogenic syncope is a malaise mediated by the vagus nerve. Vasovagal syncope is the most common type of fainting. Vasovagal syncope is most commonly found in adolescents and in older adults.
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- The vasovagal reaction is also called a vasovagal attack. The resultant fainting is synonymous with situational syncope, vasovagal syncope, vasodepressor syncope, and Gower syndrome which is named for Sir William Richard Gower (1845-1915), a famous English neurologist. See also: Syncope.
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Vasovagal (Neurocardiogenic) Syncope While the loss of consciousness with vasovagal syncope can be quite sudden, more typically it is preceded by a few seconds or a few minutes of warning symptoms. These warning symptoms often include lightheadedness, ringing in the ears, visual disturbances, sweating and/or nausea.
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Syncope and Its Causes The vertebrobasilar arteries are the blood vessels in the back of the neck, next to the spinal cord, that supply the brainstem -- the portion of the brain that, among other things, is responsible for maintaining consciousness. A blockage of blood flow in the vertebrobasilar arteries can cause syncope.
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Conditions Vasovagal syncope is the most common cause of fainting. It occurs when heart rate and blood pressure suddenly drop, causing a brief loss of consciousness. Vasovagal syncope is often triggered by stressful events, such as seeing blood or getting a shot.