Syncope is the medical term for fainting or fainting. It is caused due to a temporary decrease in the amount of blood flowing to the brain. Vasovagal syncope occurs when you faint because your body overreacts to certain triggers, such as the sight of blood or extreme emotional stress.
Common symptoms that appear when syncope occurs are fainting, feeling dizzy, pale, headache, nausea, cold sweats, blurred vision, palpitations, weak pulse. Usually, people with syncope will wake up quickly and get better when they rest. Syncope like this is usually caused by a harmless condition. However, syncope can also be caused by a serious condition and needs to be checked by a doctor. So, it is important to get treatment as soon as possible after experiencing syncope.
Vasovagal syncope can occur when the part of the nervous system that regulates heart rate and blood pressure doesn't work, blood vessels in the legs widen, fatigue, nerve disease. Common triggers that often occur include exposure to heat, seeing blood, having blood drawn, pooling of blood in the legs from standing too long and sudden changes in position (eg, from lying down to standing).
The diagnosis of vasovagal syncope can be made by physical examination. During the physical examination, what is done is to listen to the heartbeat, measure blood pressure and blood flow in various positions.
Some of the tests that can be done to determine the cause of syncope include an electrocardiogram (ECG) to record the electrical signals generated by the heart, an echocardiogram using ultrasound imaging to view the heart, exercise stress tests, which are done to study the rhythm of the heart during exercise, blood tests, tilt table tests. (head tilt test) a test performed by recording blood pressure and heart rate on a minute-by-minute or beat-by-beat basis when the table is tilted to different levels.
In most cases of vasovagal syncope, the treatment will depend on what is causing the syncope, the results of evaluation and testing. However, if vasovagal syncope is frequent enough to interfere with quality of life, it may be advisable to try one or more of the following treatments: Medications, to treat low blood pressure and may help prevent vasovagal syncope.
To prevent vasovagal syncope, things that can be done include avoiding situations or triggers that cause syncope. Therapy, by reducing blood collection in the legs, dieting for small and frequent meals, eating more salt (sodium), drinking more fluids, increasing the amount of potassium in the diet and avoiding caffeine and alcohol, avoiding standing too long, especially in places hot and crowded, be extra careful when standing, elevate the head of the bed while sleeping, surgery but very rarely done.
Source : https://www.mayoclinic.org/diseases-conditions/vasovagal-syncope/symptoms-causes/syc-20350527
https://www.mayoclinic.org/diseases-conditions/vasovagal-syncope/diagnosis-treatment/drc-20350531
https://my.clevelandclinic.org/health/diseases/17536-syncope
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