I went to the doctor today because of not feeling well for the past few weeks, chest tightness left arm pain especially in the upper shoulder area, the feeling of heartburn that wont go away with antacids. My ekg showed sinus rhythm low voltage-possible pulmonary disease, I have never smoked then said it was abnormal. My doctor set me up for a echo and a nuclear stress test. Is my ekg really abnormal or is it something else. Thank you