Is there a system "safety" weakness?
Back in slot 49, pilot contrasted aviation's "resting EKG" with an alternative:
"... a routine cardiac stress test ... it showed up something ... immediately admitted ... emergency quadruple bypass. Never had a clue - no high blood pressure, cholesterol within norms, non-smoker, basically no risk factors...."
Why pretend that the FAA's 1st Class Medical is of any good?
Maybe every pilot could demonstrate the cardiac health via a 6-minute mile, or if not that, then go do the Tread Mill with the stress test.
And next maybe the FAA could develop "cognition" exams.