S-T Segment

S-T Segment: what is it and how does it affect the diagnosis of heart disease

The S-T Segment is a region on the electrocardiogram (ECG) that represents the time interval when the ventricles of the heart are completely covered by electrical excitation. It is located between the end of the QRS complex and the beginning of the T wave and reflects the last phase of the cardiac cycle when the heart muscle recovers from contraction.

The S-T segment is of great importance in the diagnosis of heart diseases such as coronary heart disease (CHD) and acute myocardial infarction (AMI). With ischemic heart disease, the S-T segment may change its shape and height, which indicates a disturbance in the blood supply to the heart. In AMI, changes in the S-T segment are the main criterion for diagnosing the disease.

Typically, the height of the S-T segment on the ECG is less than 1 mm. However, with acute ischemia it can increase to 2-3 mm. After recovery, it usually returns to normal. If S-T segment changes persist for more than 24 hours, this may indicate a risk of complications such as myocardial infarction or arrhythmia.

For a more accurate diagnosis of heart diseases, doctors use not only changes in the S-T segment, but also other ECG parameters, such as the duration of intervals, the shape of the waves and the amplitude of the R wave. However, the S-T segment remains one of the most informative parameters, which allows identifying abnormalities in the functioning of the heart at early stages of the disease.

In conclusion, we can say that the S-T segment is an important component of the ECG, which reflects the work of the heart in the last phase of the cardiac cycle. Changes in the S-T segment may indicate the presence of serious heart disease and require additional examination of the patient. Doctors use this parameter to more accurately diagnose and choose the optimal treatment strategy.

Article: “ST segment in electrocardiography”

The S-ST segment (SEGMENT OF ST) is a period of cardiac activity that is used in the functional diagnosis of the state of the myocardium and its electrophysiology. This period represents the segment on the electrocardiogram in the interval from the beginning of the rise of the R wave to the end of the beating of the T wave and is mainly important for understanding ischemic conditions of the heart. Ischemia is a violation of the blood supply to the heart muscle, which can lead to various serious consequences. The approach in which this electrogram pattern is considered physiological is considered classical. The ST section on electrocardiograms (ECGs) is present during the time that the heart ventricle is fully excited and at rest, occupying approximately 1/2 to 2/3 of the total cardiac interval. This is the segment on the ECG that precedes the last phase of heart contraction and the restoration of the heart muscle after its compression. ST sections are measured or interpreted

The ST segment is a segment of cardiovascular activity that shows the presence of complete neural transformation and the phase of data existence at the moment that is immediately before the rapid degeneration of the ventricles, as well as at the moment when the heart is in the process of recovery after the activity of blood flow through it. It is the predecessor of the 3rd and 6th QRS T tones and is displayed for 45 - 80 milliseconds (ms), depending on the position of the cases - either at the top or behind it within 29 - 54 ms. In some situations, the ST segment may be altered because acute loss of power to the heart can cause it to weaken, often causing myocardial infarction. However, after the damage has stabilized