The debate on how to do the testing, how much testing should be done, hinges on the false positive rates. If your false positive rate, that is a test that is rated as abnormal when it's not, then withholds a athlete from participation inappropriately until a whole lot of other stuff get done, if it can be done, is really where the question is.
If it's done correctly, those numbers can be reduced to a very low, quite frankly, acceptable range. Then if you have an abnormal physical examination, an abnormal history or an abnormal EKG, you move into the more advanced testing which involves for us a visit with a cardiologist whose knowledgeable in athletic heart conditions and that age group. And then more testing probably in the form of an echocardiogram. And then if that's abnormal, you proceed to the next level, maybe even to a cardiac catheterization. That would be rare, but that's the steps you take.
But the overwhelming concern is false positives and inappropriately holding kids out of sports, out of activity when they don't need to be out.