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What is rheoencephalography (REG) of cerebral vessels?

Diseases and their symptoms associated with pathology of cerebral vessels, are in the first place appeals to the neurologist. Many are terribly frightened by the “scary and incomprehensible” names of studies that the doctor recommends, because people who are far from medicine often associate them with a suspicion of a sufficiently serious diagnosis. But this is far from the case, so it is worthwhile to calm down and understand everything in order.

One of these “incomprehensible” studies is the reoencephalography (REG) of cerebral vessels, having heard the name of which some patients are terrified because of ignorance. So what is this procedure?


What is rheoencephalography


Rheoencephalography helps to determine the state of the brain vessels

Rheoencephalography (REG) is a modern functional method for studying the conditions of the cerebral vessels, which makes it possible to evaluate their damage, blood supply, tone, elasticity, blood flow velocity, viscosity of the blood flow, the ability of the vessels to narrow and relax, the symmetry of the blood supply to the hemispheres of the brain and outflow of venous blood.

The technique of rheoencephalography consists in passing an alternating electric current through the brain tissue and fixing the parameters of electrical resistance, which depends on the volume and viscosity of the blood in the vessels of the brain. It is the indicators of current resistance that allow to evaluate the above parameters. When the vessels are full-blooded and dilated, the resistance of the current increases, and if they are narrowed, the opposite pattern is observed.

Advantages and disadvantages of vascular diagnosis

Currently, rheoencephalography is not used as often as before, because there are more accurate methods for diagnosing conditions of the brain and its vessels, such as electroencephalography (EEG), computed tomography (CT) or magnetic resonance imaging (MRI is the most accurate diagnostic method ). Due to the fact that not every hospital or clinic (for example, in regional centers) can boast the presence of modern equipment, the REG becomes a wonderful assistant in the diagnosis.

If there is a tomograph in a medical institution, and the doctor still directs to undergo rheoencephalography, the question arises: "Why is REG, not magnetic resonance imaging or computed tomography, because the second and third methods are much more informative?".

Advantages and disadvantages of REG

Many doctors, in spite of the existence of more modern diagnostic methods, still choose rheoencephalography equally

First, it is the safest way to diagnose the pathology of cerebral vessels. Secondly, not everyone can withstand the noise and the closed space of the tomograph (this is especially important when examining children, since not all children are able to be at rest, especially in the absence of a mother). Thirdly, MRI and CT compared with REG are an expensive method of examination. Also, the advantage of rheoencephalography is that when it is used, it is the vessels that are examined without affecting the “unnecessary and unnecessary” areas. Magnetic resonance and computed tomography also shows both the bones of the skull and soft tissues (most often these methods become relevant when a serious diagnosis is suspected, for example, a tumor process and others).

A significant disadvantage of REG is that any excitement, experience (and, as a rule, there is no such person who would not experience such emotions before undergoing any diagnostic procedure), failure to follow the recommendations on preparation for the procedure may affect the results of the examination.

Indications and contraindications for reoencephalography

Indications for rheoencephalography

Frequent headaches can be an indication for a survey.

The doctor may give the direction to go through rheoencephalography if the patient has the following pathological conditions:

  • headaches of varying intensity, location and duration;
  • dizziness;
  • cerebral ischemia;
  • strokes;
  • tinnitus and the appearance of "flies" before your eyes;
  • concussions and bruises of the brain;
  • bruises and fractures of the cervical spine and bones of the skull;
  • increased intracranial pressure;
  • circulatory disorders of the brain;
  • arterial hypertension;
  • vascular dystonia;
  • hypotension;
  • pathologies of the hypothalamic - pituitary region (in particular, tumor formations);
  • encephalopathy;
  • Parkinson's disease;
  • frequent fainting;
  • atherosclerosis;
  • cervical osteochondrosis;
  • memory and sleep disorders;
  • visual and auditory disorders;
  • meteorological dependence.

Rheoencephalography is considered to be a completely safe method of functional diagnostics, it can be applied to all categories of the population (from infants to the elderly). The study is not conducted in cases where the patient has defects (wounds and abrasions) and infectious diseases of the scalp.

Preparation for the survey

Preparation for the study

To obtain accurate results, it is necessary to observe emotional calm on the eve and immediately before the study.

There is no special preparation for the survey. You just need to try to adhere to the following recommendations:

  • on the eve of the study, do not take any drugs that may affect the condition of the blood vessels;
  • try to avoid stressful situations on the eve and immediately before the study;
  • do not drink coffee and strong tea on the study day in the morning;
  • on the eve and before the study do not smoke;
  • Immediately before the study, rest for 15–20 minutes;
  • Prepare napkins and towels in advance in order to remove excess gel after the procedure.

Such measures are necessary to calm the nervous system and minimal vascular changes (as you know, any excitement or the influence of certain chemicals can change the vascular picture). Compliance with such simple rules will help a specialist as accurately as possible to assess the state of the cerebral vessels and make the correct diagnosis.

Directly in the functional diagnostics room, the specialist prepares the patient for examination by degreasing the skin of the areas that need to be examined and applying rheoentrograph electrodes to them.

How is the diagnosis

Diagnosis is carried out using a special device of the reograf (rheoenterograph) connected to the device recording and issuing readings (electrocardiograph, computer, electroencephalograph and others). During the study, the patient should be in a comfortable and relaxed position. Most often it is put in a special chair. A nurse or doctor puts electrodes on the patient's head and fastens them with a special elastic tape, after having previously lubricated them with a paste or gel. For convenience, the tape is positioned so that it runs along the circumference of the head: above the area of ​​the superciliary arches, above the ears and along the back of the head.

Conducting research

The eograph tape is placed along the circumference of the head.

The areas of overlap of the electrodes will always be different and depend on which vessels should be examined:

  • if it is necessary to examine the vertebral arteries, the electrodes must be applied to the region of the occipital tubercles and mastoid processes;
  • if the object of study is the external carotid artery, the electrodes should be located in the temporal region;
  • when examining the internal carotid arteries, the electrodes are superimposed on the region of the mastoid processes and the bridge of the nose.

Basically examine all vessels at once. The survey takes an average of no more than twenty minutes.

One of the main conditions for rheoencephalography is patient calm and relaxation.

Conducting research

The location of the overlaying electrodes of the rheoencelograph depends on the location of the investigated vessels.

In addition to the standard method of carrying out the REG, there is a study using so-called functional tests. The most common are the samples with turns and tilts of the head in different directions, taking nitroglycerin (under the tongue), holding the breath, taking deep breaths and exhaling, changing body position, exercise. All readings are also recorded, and then compared to those that were made at rest.

Possible consequences after the REG

As already mentioned, rheoencephalography is a safe diagnostic method used to examine patients of any age group. As a rule, there are no consequences after carrying out this diagnostic procedure at rest.

When performing functional tests, headache may occur (nitroglycerin has such a side effect) and dizziness (after head turns or physical exertion).

Interpretation of the results

Decoding the results of the REG

Evaluation of the parameters obtained by specialists in decoding rheoencephalograms

The evaluation of the parameters of the study involved a doctor. Modern technology has simplified the complex procedure of decryption through the use of specialized computer programs. Thanks to this, the patient can receive the results of his examination within ten minutes after the end of the procedure (and not several days later, as it was before in many medical institutions). The age of the patient is of great importance, since for each age group the parameters of the rheogram change.

All data obtained as a result of the survey is converted into a graphic picture (graph), which looks very similar to an electrocardiogram. The device issues them either on paper or on a computer monitor screen.

Decoding results

Parameters evaluated by rheoencephalograph

The wave-like image (each rheogram tooth) is divided into special segments that have their own names:

  • Anacrot (ascending part of the graph);
  • top of the chart;
  • a cacacrot (downstream part of the chart);
  • incisura (teeth on the descending part of the graph);
  • dikrota or dicrotic wave (descending part of the graph, located after incisura).

The parameters of these segments are assessed such values ​​as:

  • roundness or sharpness of the graph vertices;
  • wave regularity;
  • depth dikroty;
  • where is the incisura;
  • the appearance of anakrota and catacrots;
  • the presence or absence of additional waves in the catacrot.

It should be noted that not less important are the parameters of teeth, such as amplitude and slope. They determine the correspondence of the obtained values ​​with the patient's age. For example, young teeth are more pronounced and more inclined than in older people.

Important indicators of rheoencephalogram in the table

The values ​​of these indicators build a general picture of the state of the blood vessels of the brain.

Index Value Informative
A row wave (its amplitude) The degree of opening of the vessels. Pulse fluctuations. Blood vessels.
A / E eographical index
AT diastolic wave (its amplitude) Peripheral resistance of blood flow from large vessels to small ones. The higher the score, the higher the resistance.
B / A diastolic index
FROM dirk Peripheral resistance of arterioles. The higher the score, the higher the resistance.
C / A dicrotic index
A1 late diastolic wave Peripheral resistance of blood flow from small vessels to large ones. The higher the score, the higher the resistance.
A1 / A late diastolic wavelength to amplitude ratio
A anacrot The ability of large vessels to stretch. The indicator depends on the elasticity of blood vessels. The lower their tone, the higher the rate.
a / t Anacrotic Ratio
Ab diastolic wave (its location) The value of vascular tone. The higher the index, the lower the tone.
ab / T the ratio of the diastolic wave to the main wave graph

An example of rheoencephalographic indices is normal

Normally, the rheoencephalographic curve is characterized by:

  • pointed tops (with age they flatten and flatten), clear incises and dikroty;
  • the time of raising the tine to 0.1 s, increases with age to 1.9 s;
  • ab / T should not exceed 15%;
  • A1 / A indicator should not exceed 70%;
  • C / A should not exceed 75%;
  • asymmetry of blood circulation in the cerebral hemispheres should not exceed 10%.

Patient Reviews

You can not be afraid - you will not feel anything. My child, in any case, said that it was even a little ticklish, but there was no pain.



Although the diagnosis with the help of REG is considered by many to be useless, this procedure helped us to make the diagnosis correctly.



The procedure is very incomprehensible, like the device itself. Feels like nothing happens, I do not feel anything. The only thing that the doctor asked during the “head is not spinning?” Procedure, I answered that no, it was not spinning. She was frightened that she should be spinning and will. But nothing happened. So I did not feel anything. The whole procedure took about 5 minutes. In conclusion, they gave me an extract, they told me to take it to my doctor. When I asked if everything was all right, the doctor said “yes, normal.” And, in general, this was my conclusion, because the attending physician said the same thing! I still do not understand what this procedure shows ...



What methods of examination of the brain can appoint a doctor - video

So, now it is clear that rheoencephalography is a simple procedure that allows you to identify the pathology of blood vessels and blood supply to the brain. Despite the fact that modern medicine offers more advanced methods of diagnosis, REG has been successfully used to this day, allowing doctors to make an accurate diagnosis to their patients.


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