question: I am 49 and in June 2014 I had Bradycardia with a heart rate down to 29 bpm. It has been 5 months since I got my pacemaker and I still feel as if I am not getting enough oxygen when I walk up stairs. I can handle walking on a treadmill for 3 miles without a problem. I just completed a sleep test and do not have the results. I am positive I have acid reflux too. My question is, if I hear wheezing that wakes me up when I sleep on my right side, do I need to be concerned that I have something else going on with my lungs?