An interesting point (that may well have changed now), was the first call I ever answered was on Virgin Atlantic for a woman with chest pains. No ECG (EKG) available but an AED, the abnormality was SOP only allowed the crew to actually defib a patient but I could give all the drugs, etc.!
If you know Prof. Chamberlain Paracab, I was heavily quizzed by him a few weeks later about the suitability of the on board supplies - the only issue was the size of the sharps container didn't allow for cannula needles! I later found out that he was the advisor for their medical kits.
HTC