I am not a doctor or medical professional. Please take everything I say as unqualified. Seek advice from your doctor.
Your best bet is probably going to be to talk to your mom's cardiologist about this. HR is the heart rate. P DUR looks to be the duration of the p wave. PR int is the PR interval. QRS is the width of the QRS complex. QT is the duration from the beginning of Q until the end of T. QTC is QT corrected for heart rate: there are several empirical forumlas for correcting it. The axiis specify a sort of mean direction of the "conduction wave" at the point in the cycle of interest. For instance the p axis specifies the direction during atrial contraction.
There are two special notes here. The first indicates that there is a characteristic in the ST/T piece of the ecg that is of interest. It may or may not be abnormal; for now, just of interest. I do not recognize the last line. It might also indicate something special, such as a particular measurement gleaned off of the ecg trace, or perhaps off of the machine. I have never seen it, but this is no surprise. As I mentioned. I am not a medical professional. Just been looking at my own.
You can find all sort of information online if you want to know more. But keep in mind that a doctor is going to have to be your source for interpretation.
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