An electrocardiogram is a very common clinical detection method, which mainly uses an electrocardiograph to record from the body surface the electrical activity changes generated by each cardiac cycle of the heart. It has a wide range of applications, can record the electrical activity of the normal human heart, and can also help doctors diagnose arrhythmias , diagnose myocardial ischemia , and determine the status of artificial cardiac pacing.
What is a 12-channel electrocardiogram
1. The 12-channel ECG is a 12-lead, compressive limb lead and pre-chest lead ECG, which is a kind of common ECG. It can reflect whether the patient’s heart is enlarged or hypertrophic through the 12-channel ECG;
2. As a common ECG, doctors can judge whether the patient has arrhythmia by observing the patient’s twelve-channel ECG. In addition, myocardial insufficiency and myocardial infarction, the impact of drugs or electrolytes on the heart, and the presence of conduction block, etc., can also be demonstrated by 12-channel ECG.
The principle of generating an ordinary electrocardiogram
Generally, in the case of surprise state, positively charged cations are arranged outside the membrane of cardiomyocytes, and negatively charged anions are arranged in the membrane. In the resting state, the cardiomyocytes of the heart are in a polarized state, and there is no potential difference, and the potential curve displayed by the current recorder is flat, which is shown as the isoelectric line of the body surface electrocardiogram. When myocardial cells are stimulated, the permeability of the cell membrane will change, resulting in a certain potential change in and outside the membrane. make a difference.
