Phil, Before giving up on your CPAP, you may wish to ask your doctor (preferably a cardiologist or pulmonologist) for an echocardiogram and about any signs of pulmonary hypertension.
"Obstructive sleep apnea (OSA) has been identified as a significant cause of and/or contributor to cardiovascular disease. OSA has been shown to increase the risk for hypertension, pulmonary vascular disease, ischemic heart disease, stroke, congestive heart failure, and arrhythmias." Many of which are silent, progressive, and deadly.
Best of luck.
Thanks for the input.
This journey started as an investigation into several blackouts, normally about a year apart. After numerous tests that proved little and ended up with "not sure what is wrong, but here take this medication", the spectre of OSA raised it's ugly head.
In all honesty I am fed up with all of them, I have had enough, and will be returning to CPAP once my licence is returned, for legal reasons only, not that I have any faith at all in the treatment.
Oh, and the quacks are unable to agree between themselves if there is a connection between OSA and epilepsy, alleged epilepsy that should read.