I'm conflicted about this. I realise that for a lot of conditions getting to the next station is the wisest course of action. However I was told, after what was initially believed to be a heart Attack which I 'soldiered on' through, in no uncertain terms by my GP that if it happened again I was to get help ASAP. My understanding is that if CPR is required the sooner it is started the greater the chance of survival.
It turned out to be a Heart Malfunction BTW, just not one that is life threatening.
With regard to training my attitude is that it would be good if staff were trained to recognise what to do, in terms of things like continuing immediately to the next station, calling for medical assistance from passengers etc, if presented with various symptoms. My scare happened on a station but if I was on a train and it really was what was feared then getting CPR started could have been the difference between me living and dieing (at least as I understand it). Then I should have been got to professional care ASAP.
It is unfair to staff to place them in a situation where they might have to make life or death decisions without guidance. Maybe something along the lines of what the RNLI use, which differs substantially from the First Aid at Work syllabus would be appropriate. Basically diagnosis is downplayed, there are cards with 'check for this', 'if you see that' and instructions like 'call for helicopter', 'make best speed for shore', 'transport to shore with minimum disturbance to casualty' etc. The little I have picked up is that it is as much focused on managing the overall situation in scenarios where external help isn't necessarily a short distance away as it is on treating the patient.
I suspect what staff could do with is guidance on things like making the decision on 'stop and investigate', 'call for passenger assistance', 'continue to next booked stop', 'continue to next track access point' etc. They are much better off managing the overall situation and making use of their railway knowledge whilst, at least ideally, passengers (preferably medically trained, if they can be found) carry out any treatment than getting stuck in, losing the big picture and being less able to interact with the rest of the railway.