I Am A 47 Yr Old. Female With Maternal Family

I am a 47 yr old. Female with maternal family history of heart attacks. I door. Smoke or drink. My labs are in the slightly elevated normal. I am not obese. I recently had a physical and they did a ecg. Minor right precoridial re polarization disturbance with negative t in v2 and flat or low negative t in v3 with long at interval. My dr didn't say what that means just that should get ultra sound of my heart and get a holster monitor. What does this mean?