Vazovagal syncope: a description, causes, symptoms and features of treatment

Many people, for various reasons, happenFainting, which is a temporary loss of consciousness. This causes a temporary disturbance of the blood supply to the brain. It can indicate the presence of a serious disease. In medicine, there is such a thing as vasovagal syncope, which is accompanied by a sharp decrease in the frequency of cardiac contractions and a drop in blood pressure.

It is considered not life-threatening, but ifoften, the quality of life is significantly reduced. There is a symptom in childhood, and the nature of the attack with the course of life does not change. Let's try to consider what vazovagal syncope, symptoms, causes of their occurrence.

Features of the disease

This pathological condition is characterized bytemporary loss of consciousness, mainly when a person is in a standing position. It arises as follows: because of a fairly low venous return, sympathetic tone begins to increase. In people suffering from frequent faints of this type, this increase is quite large, which causes an increased contraction of the heart. Intensive impulses come to the brain from the nerves, which leads to an increase in parasympathetic and a decrease in sympathetic tone. As a result, there is a bradycardia that lowers blood pressure, which is what causes fainting.

Causes

Vazovagal syncope usually occurs due to an incorrect reaction of the body to irritation of specific receptors of the autonomic nervous system.

The most common causes of this ailment are:

strong emotions, for example, fear;
taking blood from a finger or vein, pain;
long standing in a standing position;
moderate exercise with sudden stop;
wearing a tight tie or collar;
fear of going to the dentist.

Thus, if a vasovagalfainting, the reasons for this may be different. In any case, it is accompanied by a sharp widening of the blood vessels, a reduction in the heart rate up to cardiac arrest, and slowing of breathing. Consciousness returns back on its own within a few seconds.

People suffering from cardiovascular diseases, in general, are contraindicated for a long time to be on the heat in a standing position, since there is a high probability of fainting.

Symptoms

Fainting vasovagal is accompanied by the following symptoms:

immediately before the loss of consciousness, sweating, nausea, darkening in the eyes, tinnitus;
the skin becomes pale;
significantly reduced heart rate and pressure;
Syncope always occurs when a person is in an upright position, and if at the beginning of an attack to lay it horizontally, then the ailment will recede.

Diagnostics

The doctor should be contacted immediately, as happenedfirst attack. Usually, the reasons for this fainting are not terrible, but sometimes this can indicate serious disruption of the body. For example, about a tumor and cardiovascular diseases, which can lead to death.

First, the doctor finds out from the patient when thefainting, whether they are of the same type that precedes the loss of consciousness and with what the patient can connect their occurrence. After this the doctor starts to be interested in the following questions:

the profession of the patient and whether it is connected with the risk to life (driver, pilot, diver, roofer);
whether the relatives of the patient suffer from cardiovascular diseases, did they lose consciousness, since vasovagal syncope can be hereditary.

Then the doctor examines the patient, notes his skin color, appearance of the nails, hair, respiratory rate, the presence of heart murmurs and wheezing in the lungs. Assigns a general and biochemical blood test.

In addition, the diagnosis includes the following procedures:

Electrocardiography (ECG), which determines the performance of the heart.
Daily monitoring of the electrocardiogram byHolter (HMECG). During 24-72 hours, an electrocardiogram is recorded, and if it is possible to fix a syncope, then certain changes are displayed on it. Outside fainting, normal symptoms are noted.
Echocardiography (EchoCG). It is carried out only in order to exclude diseases of blood vessels and heart.
Orthostatic test. With the help of this method, a diagnosis of "vasovagal syncope" is made. The essence of this procedure is that the patient lays down on a special bed at an angle of 60 degrees for 30 minutes. During this time, the parameters of the electrocardiogram are taken, automatically or manually measured blood pressure. During fainting there is a sharp drop in pressure and irregularities in the work of the heart.

Fainting vazovagalnye can be single. Not necessarily they are provoked by any disease, often a loss of consciousness also happens in perfectly healthy people.

First aid in fainting

If the patient has a pre-occlusiveor he has already lost consciousness, he should be put on a horizontal surface, unfastened or removed from his clothes - it restricts his breathing - and his feet put on a hill to ensure the flow of blood to the head. In most cases, such help allows a person to quickly recover.

But it also happens that he continues to be inunconsciousness. In this case it is necessary from the outside world to give the brain any signal, so that it reacts and starts the whole "system". This requires any strong stimulus. For example, you can give him a sniff of ammonia, sprinkle his face with cold water or lightly pat his cheeks.

Do not give the patient immediately to get up, afteras there was a vasovagal syncope, as the blood supply has not yet fully recovered. It is necessary to bring him to life gradually, to the extent possible controlling his condition. If such methods did not help, you should urgently call for an ambulance, since prolonged hypoxia of the brain can cause irreversible changes, even to death.

Medication

If vasovagal syncope is diagnosed,treatment depends on the severity of the ailment. In some cases, loss of consciousness happens very often, and sometimes it happens that fainting pass on their own. Treatment is usually prescribed to those who have such a pathological condition occurs so often that a person becomes disabled.

Medication therapy includesthe use of such beta-blockers, such as "Atenol" and "Metoprolol." With the help of these drugs, the processes of myocardial contraction are reduced and excessive activation of the mechanoreceptors of the heart is prevented.

Bradycardia is treated with M-holinoblokatorami. Basically, these are plasters, consisting of scopolamine. Use them should be once for three days. To reduce the frequency of fainting, the doctor appoints "Dizopiramid", which has M-cholinoblock and negative inotropic effects. Much less often use "Theophylline".

If serious cardiac dysfunctions, lack of trace elements or a tumor were detected during the diagnosis, the doctor should prescribe the treatment methods in accordance with these diseases.

Surgery

Such treatment provides for the installation of an electrocardiostimulator. For this, a combination of the following factors is necessary:

the age of the patient is over 40;
frequent syncope;
there are no precursors of loss of consciousness (darkening in the eyes, dizziness, noise in the ears);
cardiac arrest is fixed.

Fainting after exercise

There are situations that occurvasovagal syncope after exercise. In this case, provoking factors are: a tight collar, a sharp turn of the head, a strong contraction of the chest, pressure on the area of the sinocarotid sinus.

There is a vasovagal syncope in athletes in this way:

there is a sudden reflex dilatation of the peripheral vessels, as a result of which the cardiac output sharply decreases and cerebral hypoxia develops;
a sudden reflex suppression of the cardiac activity by the vagus nerve is carried out until the heart is completely stopped.

In the first case, a normal syncope occurs, and in the second case, blood circulation suddenly stops, which requires immediate medical attention.

Preventive measures

If no serious illness has been diagnosed, serious consideration should be given to the implementation of preventive measures, which are as follows:

It is necessary to avoid situations that can trigger a loss of consciousness;
you can not stay in the heat for long, starve, smoke, drink alcohol, overwork;
It is necessary to limit strong physical activity for three months;
It is necessary to strengthen health - to be engaged in easy jogging in the mornings, swimming, aqua aerobics;
Positively affect the vessels contrast shower and hardening;
so that blood pressure is always normal, it is necessary to observe the regime of the day, that is, to find the best balance between work and rest, which will help to save forces;
one can not sharply tilt and rise from the prone position, since an orthostatic collapse may occur;
Well normalizes the pressure of drinking herbal tea from chamomile and mint, St. John's wort, as well as lemon balm.

Fainting with pregnancy

Sometimes vasovagal syncope occurs inpregnancy time. The condition of a woman in an interesting position is often accompanied by a general malaise and increased weakness, and this is due to increased strain on the body. The onset of fainting makes her very worried. They arise in the following cases:

a sharp change in blood circulation;
low blood sugar;
sharp movements;
heat and stuffiness;
long and frequent lying on the back;
toxicosis.

Frequent fainting is dangerous because of their fall, so you should tell your gynecologist.

Conclusion

Thus, vasovagal fainting canprovoke serious enough diseases, so you should definitely consult a doctor for diagnosis and treatment. In healthy people, they also sometimes occur. Thanks to preventive measures, such an ailment can be avoided.