I have sleep apnea, the cpap machine has made me a different person. I can actually stay awake long enough to talk to my family at night.
They found mine when I had a heart cath. in July, I stopped breathing so much they had a hard time keeping my vitals regulated. My heart was fine, I went through the sleep test the very next night. I stopped breathing 97 times in an hour. So hopefully the cpap will work for you too.
I will keep you in my prayers, that is definately too much fluid to be around your heart. I don't know how you were able to breathe.