I am a 40 yr old female, 5 5 , 145 lbs. Tachycardia , (on Metoprolol 25 mg, 2x daily), just received EKG referral. Referral states: EKG shows frequent PACs with possible anteroseptal infarct . Also states to expedite referral due to diagnosis. I m kinda anxious...can someone please explain what all this means, and what I m to do while waiting for my appt? Thank you :) Lori K.