"Myocarditis can also be caused by certain medications, as well as by some autoimmune diseases,” he says. “And, though rare, myocarditis can be caused by an immune response to a vaccine such as the smallpox vaccine, which was the most successful vaccine in world history.”
Someone will be along shortly to distort this information or play up Yale's 'spin' (nothing to see here) but I wanted to make the point that vaccines can cause myocarditis.
Myocarditis, COVID-19, and mRNA Vaccines: Is There a Connection? > News > Yale Medicine
What if it's not a pre-existing condition? What if it is normal growth from puberty?
I did a cursory Google search on papers regarding body growth (specifically heart growth) during puberty, and the results were interesting. Certain organs grow at different rates, some grow at a constant rate, others grow in an accelerated spurt and then slow down again. Muscle growth in boys is faster than with girls, while body fat grows faster in girls than in boys.
I'm wondering if what we're seeing in these cases with boys is not a pre-existing heart condition, but rather, early growth of the heart muscle during puberty relative to the growth of the rest of the body, such that it appears to be a heart condition when it is really not.
I have no medical background so I can only ask the questions. Others will have to provide the answers in a straight-forward way. But, could this explain why we're seeing clusters of heart reactions in boys but not girls? Could the idea of a growing heart due to pubescent hormonal changes explain why boys' hearts appear to be more susceptible to reactions from the vaccine rather than labeling it as a pre-existing heart condition in so many young boys?
-PJ
Quite possible, but nothing about enlarged heart.