![]() Beta-blockers: These drugs are more effective in preventing VVS in people who are older than 42 years.Fludrocortisone: This drug is a type of corticosteroid that can help maintain blood pressure by increasing sodium and fluid levels in the body.Alpha-1 agonists: These drugs help raise blood pressure. ![]() However, in some circumstances, the following medications may be effective in reducing the frequency of VVS episodes: Medications are not usually necessary for VVS. Doctors advise people with this condition to avoid known fainting triggers and take precautions to prevent injury when symptoms of imminent fainting begin. These actions may help restore blood flow to the brain, thereby helping the person regain consciousness more quickly.Īccording to a 2016 review, limited treatment options are available for people with VVS. However, a bystander can intervene by laying the person on their back and raising their legs in the air. VVS does not typically require treatment. Researchers are not sure what causes VVS during exercise, but they think that the Bezold-Jarisch reflex - a type of inhibitory reflex that lowers blood pressure - could be responsible.Īdditionally, changes in serotonin, peripheral opioids, and adenosine levels may trigger VVS when a person is engaging in high levels of physical exertion. ExerciseĮxercise-induced VVS is rare, and doctors must rule out other life threatening diseases, including heart disease and arrhythmia, before confirming a diagnosis. However, in combination with dehydration, this response can lead to a sudden and significant drop in blood pressure, causing a person to faint. When a person is in a hot environment, and their core temperature is reaching a dangerous level, the body will divert blood to the surface of the skin to cool itself down and prevent overheating. When the brain no longer receives a healthy amount of oxygen, a person loses consciousness and faints. This series of physiological responses stimulates the parasympathetic nervous system, which causes a rapid drop in blood pressure and a reduction in blood flow to the brain. When the pressure in the rectum increases, the epiglottis - a piece of tissue that sits behind the tongue at the back of the throat - closes over the windpipe and causes the diaphragm to tighten excessively. If someone is experiencing severe constipation, they may faint when passing a stool due to increased pressure in the rectum.
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