What Causes Heart Arrhythmia With Arm Numbness?

Hi, may I answer your health queries right now ? Please type your query here...Female, I reached 65 yrs and had a Medicare Physical this week. The EKG was one of the tests and it shows early BBB, probable left atrial abnormality. I take a thyroid pill and two eye drops for glaucoma, nothing else. Low cholesterol, low blood pressure, no other health history to speak of, the glaucoma has been my challenge. I am 5'6" and weigh 180 lbs. I did have rheumatic fever at 5 yrs old but never been bothered by it. About 3 years ago, I started feeling my heart quiver or shake a little during the night and both arms go numb unless I keep them straightened out with a pillow. I have told this Dr. and also the Eye Specialist about this but nothing was pursued until I asked for the EKG during the Medicare Physical. The Dr. took blood for numerous tests that won't be back for several days. Shouldn't I pursue a cardio evaluation to be sure it's not serious? I am an insurance agent and stay very busy, I am not ill but seem to be weakening in the last 3 years.