The symptoms of a severe stomach ache can be remarkably similar to that of a heart attack. It's my guess that this what was suspected and would justify an emergency call-out (as stated the Dr will have to go off the symptoms being described to make the call). Unfortunately, afterwards it turns out it was just a stomach-ache which of course isn't an emergency and the armchair brigade swing into full 'safety was compromised unnecessarily' without knowing the real circumstances.....of course, this is also speculation!