What do you mean by measuring ECG and saying that the record is poor?

Your ECG conclusion must be automatically reported by the machine, and the reliability is very small. For a 20-year-old woman, acute lateral wall infarction is almost impossible (estimated to be a few parts per million). It doesn't make much sense to transpose counterclockwise. Poor recording means poor contact between the machine and the human body, so the reliability of the results is reduced. Only ventricular premature beats can be accurate, that is, the so-called ventricular premature beats, which refer to the premature and irregular beating of some hearts. If the quantity is small, there is not much harm. If you obviously feel flustered and may have more premature beats, you can do a 24-hour dynamic electrocardiogram examination (a small machine records the electrocardiogram 24 hours a day) and decide whether to treat it according to the results. Generally speaking, the problem is not big. Take it easy.