PREVIEW

... for a long time.

   However, it is easy to get started with ECG knowledge, but extremely difficult to master.

   ECG, a small piece of paper, records the changes in the electrocardiogram vector on the surface of the human body.

The magic of    is that through this trivial image, people can gain insight into various heart-related diseases, including arrhythmia, coronary heart disease, myocarditis, pericarditis, etc.

   Even a small change corresponds to the occurrence ...

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