Well done sir. My brother ended up the lone responder on a flight over the pole from Heathrow, no doctors, nurses, EMTs, just an air crew without enough know-how and him, he has volunteered in two ERs but has been busy hocking software for at least a decade. He was 'in charge' because the woman was sitting next to him when she collapsed unconscious into the aisle. No one else stepped up, so he stepped in. He kept the patient stable and on oxygen and the flight diverted to Innavut or somewhere like that to get her medical assistance.
The one thing he mentioned is some a-hole snapping pics of the woman during treatment, the air crew made that guy stop. Its nice to think that someone will come along and take over treatment with greater expertise than you, but probably not, you may be all that's available, best to get it done with what you have, which is mostly between your ears (plus oxygen).
I think my bro got alot of thanks and gratitude from the crew and is lately on the short list for receiving free and sudden upgrades on that particular airline (one that he doesn't often fly on actually).