Thanks for the detailed report
I haven't heard of this combination, can you provide a link?
Her rapid breathing (as shown in the videos from her 30 April 2103 dive) combined with doing the Valsalva manoeuvre (equalising the pressure in your ears by holding your nose and exhaling) as she dropped back into the wreck caused her to pass out. This is a known possibility for someone who is hyperventilating
I haven't heard of this combination, can you provide a link?