This study does not bring the patient any discomfort, pain or harm. The person is comfortable is on the couch, his limbs and chest to attach the electrodes. The wires from them join in the apparatus, from which the paper tape with the cardiogram. During the attack of arrhythmia or heart pain exactly the electrocardiogram will show how dangerous the violation occurred. Up-to-date research — the key to proper treatment depends on the patient's life. This study most accurately measures your heart rate, that is, the electrical activity of the heart. If the heart beats ritmichno, cardiography accurately and in detail will show what's going on. The doctor will be able to determine the source of pathological electrical signals, to see the path, to assess the degree of seriousness and the effectiveness of treatment of arrhythmia. ECG also gives the opportunity to detect the beat - contraction of the myocardium. In addition, the study can identify violations such as atrial flutter and flicker. Less accurate measurement of the electrocardiogram is condition of the heart muscle. Decoding cardiogram, any cardiologist will be able to notice the patient's likelihood of a heart attack. But in the future, these deviations should be confirmed by other studies. More informative ECG, who acted in a moment of intense physical activity of the patient. Checking of electrical signals passing through the heart - quick, affordable and often very useful method of diagnosis, but it is still indirect examination. Sometimes the electrical signals pass through the seriously damaged areas with virtually no latency, giving the normal curve. ECG is unable to identify coronary atherosclerosis. Decoding cardiogram performed by a physician with consideration of complex clinical data of complaints of the patient, knowledge of the history of the disease, assess its condition, the data of the medical examination.