Shortness of breath and lowered pulse-ox. c T Wave Abnormality?

I have had throughout the course of my life, age 53 male-nevered smoked anything and currently 18 years without alcohol, a lower than expected pulse-ox. reading (93-97 max) usually noticed during some minor surgical procedure, but never higher than 97 even when spot checked. Recently, I have noticed a slight difficulty in getting a deep breath and tire easier than what I call routine/normal. I was cleared of cardiac problems two years ago secondary to a complete workup following an abnormal EKG. Recently, during a pre-op workup, I was told that I had a borderline EKG secondary to T wave abnormalities. My treatment team was unconcerned. In the answer I got to my earlier question, which was excellent information and greatly appreciated, I wa told that T waves can indicate oxygenation levels in the blood (paraphrased), with my recent shortness of breath and lower than expected pulse-ox. levels, does this create any additional level of concern?