It sounds like you are suggesting that, based on your citation, cardiologists have ruled out myocarditis possibly as a result of the experimental wonder drug, and didn’t bother checking.
They’ve said nothing about this contributing to the appearance of a coverup.
I'm suggesting nothing other than that JAMA study flatly states Commotio Cordis is a well-researched injury for over 50 years, and that many research institutions have spent time and money invested in raising the survival rate. I'm so grateful Hamlin is going to recover if for no other reason than to spoil all these threads for the haters.