I called my cardiologist and was told not to sorry. Apparently this is the way my heart has always been anatomically. He said not to worry, but that's what I do best. I noticed with a left atrium enlargement sleep apnea, high blood pressure and Afib are all connected. I just got diagnosed with mild sleep apnea, have gone into afib 3 times so far, and have borderline high blood pressure. It seems to me I should be concerned but the MD doesn't really seem to be.