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Electrocardiography (ECG)

Electrocardiography in Ternopil: Viasan Medical Centre

Electrocardiography (ECG) is a highly informative, accessible and safe method of physiological diagnosis in cardiology. It is based on the registration and study of electrical potentials generated during heart function. It makes possible to detect hidden signs of a large number of cardiac pathologies before the onset of symptoms. Based on the results of the cardiogram, it is possible to draw conclusions about the normal or abnormal heart function. It is prescribed for diagnostic and preventive purposes to adults and children.

Electrocardiography in Ternopil can be performed at the Viasan Medical Centre,

st. Medova, 12. By appointment.

Consultation of an experienced cardiologist. Call!

The essence of the examination

Electrocardiography is a valuable functional diagnosis of cardiovascular pathology based on the measurement of myocardial electric field fluctuations.

It is performed with the help of a device (an electrocardiograph) which registers the change of cardiac electrical impulses on paper or screen in the form of a graph (a serrated curve). An electrocardiograph is a unit for receiving and recording signals with a standard set of lead electrodes.

Heart cells are a kind of microelectric generator, capable of charging and discharging during the passage of an electrical impulse. The ECG is a graphical representation of the overall operation of these generators. Cardiac impulses are generated automatically in the atria in the sinoatrial node (SN), so the normal heart rhythm is sinus.

The occurrence of the pulse in the SN and its passage through the atria is recorded on the cardiogram by the P prong. Then the excitation is transmitted through the atrioventricular node (AN) by the His beam to the ventricles. AN cells have a lower conduction velocity, so a PQ interval appears between the P wave and ventricular excitation.

Then the electrical impulse comes through the conduction system to the right and left ventricles. Graphically, the QRS complex reflects this. During the period of both ventricles complete excitation, the potential difference disappears, the cardiogram registers the isoline. After that, repolarization begins – the restoration of the original electroactivity that appears on the ECG as prongs T and U.

The distance from the beginning of Q to the end of T is called the interval QT, which reflects the ventricular electrical systole. This indicator determines the duration of the phase of excitation, contraction and repolarization.

Registration of changes in the potential difference is carried out from the surface of the body (upper, lower extremities, chest). The electrodes are installed at certain points and connected to the galvanometer of the electrocardiograph.

The ECG allows:

  • to verify conduction disorders (arrhythmia);
  • to determine the location of focal changes (ischemia, scars);
  • to establish signs of loading and hypertrophy of cardiac chambers;
  • to detect early signs of heart failure;
  • to monitor the dynamics of the disease;
  • to evaluate the effectiveness of ongoing therapy.


  • pain, discomfort in the heart;
  • suspected cardiac pathology;
  • shortness of breath;
  • episodes of hypertension;
  • heart rhythm disorders (arrhythmias);
  • diagnosed coronary heart disease;
  • acute, subacute myocardial infarction;
  • postinfarction cardiosclerosis;
  • cardiomyopathies of different genesis;
  • as mandatory preventive screening.


  • to refrain from coffee, tea, energy, do not smoke;
  • not to do take sedatives the day before;
  • to exclude physical activity before the examination.

The course of the procedure

Electrocardiography is performed in a supine position. Areas of the body on which electrodes will be placed are exposed: chest, wrists, ankles. Red electrode is placed on the right hand, the yellow one – on the left hand; the black electrode is put on the right leg, while the green one is attached to the left leg.

Six electrodes (1 – red, 2 – yellow, 3 – green, 4 – brown, 5 – black, 6 – blue) are superimposed on the chest in the given positions (one electrode, which is moved to the necessary points, can be used instead).

An electrocardiogram is a graph with different lengths and heights of prongs that reflect heartbeats. The ECG is interpreted by a cardiologist or a functional diagnostician.

Advantages of ECG in Viasan:

  • modern medical centre;
  • professional equipment;
  • professionals of expert level;
  • the possibility of quality diagnosis;
  • European level of service.
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кардіолог тернопіль
Galushka Irina
years experience
функціональна діагностика, узд серця, добовий холтер моніторинг, спірографія
Perets Olga
Doctor of Functional Diagnostics
years experience