<s>[INST] I am 38 and I had an abnormal EKG today.  They are sending me for furthering testing, but I was wondering what it could mean.  I pass out sometimes, but I have low blood sugar and migranes, which could cause the passing out as well.  I am 5feet 7inches and weigh about 125lbs.. [/INST] Hello, I passed carefully through your question and would explain that low blood sugar can lead to fainting. Anyway, your ECG is abnormal, cardiac arrhythmia should be excluded first. I would like to directly review your ECG report for a more professional opinion. Considering an abnormal ECG, other tests are needed: - a cardiac ultrasound-blood electrolytes- an ambulatory 24-48 hours ECG monitoring to investigate for cardiac arrhythmia. Hope I have answered your query. Let me know if I can assist you further. </s>