thanks for writing to healthcaremagic.com
Borderline left axis deviation in itself does not carry any meaning. it just shows that mean of all electrical activity of your heart is directed to slightly leftward. More important issue is
what other findings were there in the ECG? if it was otherwise normal and you also do not have any problem, specifically not shortness of breath
or chest discomfort
on exercise, using stairs etc. if you do not have any clinical problem and your ECG does not shows anything else. relax. you can discuss the findings of ECG with your physician on next visit. but if you have any symptom or ECG has more findings, please consult your cardiologist.
one more thing, this idea of getting an ECG done every year on your own is not good. please see your physician before you get any test done.