For several months I have been experiencing gasping for breath while I am awake. I will be breathing normally and suddenly my chest heaves and I take a fast, almost alarming, gasp of air. This happens while sitting calmly, walking, or laying down. It is not related to active or stressful behaviors. I am a male, age 59, weighing about 190lb, and about 5' 11''. I know I have sleep apnea and it has been diagnosed as being central sleep apnea as opposed to obstructive sleep apnea. I use a bipap machine, but I am asking about gasping for breath while awake. I don't notice stopping breathing just prior to the gasp. I don't know if this is lung related, heart related, or central nervous system related. It feeling alot like a stroung hiccup, but involves a gasp. It has happened twice while I typed this, but I can go hours and not experience one of these gasps. Any ideas?