You did the right thing, by not panicking instead opening the window and taking deep breath. Your doctor had a good explanation, but how to prevent happening again that is the harder question.And Ed has a great point: how your doctor knows?
I tell you how that was for my husband. The same thing twice happened to him: once he pulled the car a side and was waited, he was alone, once again years later he had that thing after waking up and sitting. He said these events were very scary and he is not a weak man in any way. Thinking: ‘if it will be everything ok again’ he said was awful. What he was thinking why he got that: it was a draft and his head was always sensitive for that, draft used to gave him headache sometimes dizziness , so he was always kind of careful, but it is not all the time easy to be careful. After that second almost passing out event. He won’t go out without wearing something on his head and never sit places where the opposite side of windows is open. We changed the place of his bed far from the window. He said he was sure his head got a cold there when it was near. So far he is healthy and that never happened again.(All his tests were always good normal blood pr.no narrowing arteries etc.)
Best to you.
I have blockages in both carotids and have been told this CANNOT be put off. (My insurance won't cover anything cardiovascular for the first 12 months) I am strong and can fight back symptoms, also, but there comes a time when we just have to hand this over to the professionals. Seek some medical advice. Take care, Ally
Syncope can be caused by many things, but your Doctor has already diagnosed it as narrowing of your arteries. Has this been confirmed with tests? When you reach the stage of syncope, it's normally time to have the blockages intervened. I hope that you're not having TIA episodes. I would seek medical attention as soon as possible. I applaud you for fighting the anxiety which doesn't help when added to the situation.