Sinus rhythm st changes

There are many patients with sinus arrhythmia in our lives. When the disease occurs, their hearts may suddenly beat very fast or very slowly, which is particularly prone to sudden death. Many people with sinus arrhythmia will often do electrocardiograms to check their heartbeats. There is an ST segment on the electrocardiogram. Based on this ST segment, the patient's myocardial problems can be judged. So how does the sinus rhythm ST change?

Sinus rhythm means that the cardiac pacemaker is located at the sinoatrial node, which is the normal pacemaker position. Generally, the heart rhythm of a normal person is sinus rhythm.

The ST segment mainly represents the process of slow ventricular repolarization. ST segment changes generally reflect myocardial problems.

If the ST segment moves downward by more than 0.05mv, which is half a grid, there may be problems such as myocardial ischemia;

For ST segment elevation, the chest leads V1 and V2, ST elevation should not exceed 0.3mv, which is 3 small grids; V3 should not exceed 0.5mv, which is 5 small grids; V4-V6 should not exceed 0.1mv, which is one small grid; if the ST segment exceeds the above range, it may be a disease such as myocardial infarction, and the specific location depends on which lead is elevated, and then the corresponding treatment measures should be taken.

"Sinus arrhythmia" is most common in children and adolescents, but is also not uncommon in adults. The beating of a normal human heart is directed by a high-level command center called the sinoatrial node. The sinoatrial node sends signals to stimulate the heart to beat. The heartbeat caused by the signal from the sinoatrial node is called normal "sinus rhythm", with a frequency of about 60-100 beats per minute. This is where the number of heart beats per minute, or heart rate, comes from. But this frequency may be affected by many factors, even breathing.

Normally, the heartbeat rhythm is regular. If the heartbeat is irregular, we call it arrhythmia. From this perspective, "sinus arrhythmia" is the most common type of arrhythmia, which is caused by the fact that the signal from the sinoatrial node is not completely regular. However, most of these "arrhythmias" belong to "respiratory sinus arrhythmia", which is a normal physiological phenomenon. Its characteristic is that it changes with breathing. The heart rate may increase by several beats when inhaling and slow down by several beats when exhaling. Its fast and slow cycle is exactly equal to one breathing cycle, and the heart rhythm becomes regular when holding the breath. This "sinus arrhythmia" that changes with breathing is completely normal and there is no need to worry or treat it.

Therefore, people diagnosed with "sinus arrhythmia" can pay attention to whether there is any relationship between the acceleration and deceleration of their heart rate and their breathing. As long as there are no other symptoms, no treatment is needed and you can study and live normally. Now many doctors have also noticed the panic that "sinus arrhythmia" brings to people, so they will write "sinus rhythm" when diagnosing. In addition, factors such as mental stress may also cause "sinus arrhythmia", which also does not require treatment.