. And as there is no ACLS equipment or cardiac med's aboard, just CPR, O2 and defib., nothing above an "First Responder" (below EMT-Basic) level of care can be given anyway.
How ever it is not just the case of not having suitable equipment on board.
In-flight surgery with a coat-hanger and silverware
https://en.wikipedia.org/wiki/Angus_Wallace
"In the aftermath, Wallace and Wong published a brief article in the British Medical Journal about the incident. Wallace also testified before a Parliamentary committee investigating British airlines' alleged lack of investment in on-board medical equipment.] He was even more critical of US airlines in this regard, noting that his efforts would have been impossible with typical US airline medical kits not even containing aspirin, and stated that "There needs to be a major change in attitudes in the U.S., both from the government and from the airlines."