Having cardiomyopathy, I thought the same thing. I still wonder if that is not true. However, the article refers to this as' X factor'.
However, all that being said, putting my thinking cap on, that is talking about genetic traits and such. Is his condition is the same condition as found in human athletes - enlarged heart? With my lay understanding of it, this means cardiomyopathy. But is it benign or not? Is it cardiomyopathy or not?
We may wrongly be assuming that such an enlarged heart = cardiomyopathy. Now, whether or not he had obstructive cardiomyopathy or arrhythmia, that is the true question. I have that, but others may not. In my situation, at some point a portion of my heart (septal), blocks blood flow when it becomes engorged with blood. In a heart with uniform enlargement, heart may have a complete blood flow.