I can just give you an "I understand" your frustration. I am mid-process to addressing my symptoms -- similar to your own. I am now trying to adjust to CPAP machine since I have mild sleep apnea. I go in for a breathing test next week. I do not have an afib diagnosis...just heart palpitations, but have the same symptoms as you. Just wondering if you or your doctor have explored looking at apnea and breathing solutions before the more intrusive rememdies.