Myocarditis (heart muscle), pericarditis (sac surrounding the heart), and endocarditis (inner wall of heart and valves) can all be caused by bacteria, virus, and fungus infections though they’re all rare. They also cause real bad chest pain, fatigue, and shortness of breath. Viruses are more likely to cause myo and peri while bacteria endo. In the other threads it has been said MVP was taking antibiotics so it was a bacterial infection. That usually causes issues for endo if the antibiotics aren’t taken as ordered and for the full treatment because it could not kill all of the bacteria and the surviving cells could and can mutate into a super bacteria that’s stronger and harder to kill. These conditions also get more common if the infection gets into the bloodstream so it’s moving through the whole body and the heart is at the center. But health wise, MVP is in amazing shape, the main issue would just be if he’s overextending himself training and his body is worn down due to rebuilding from training and fighting the infection. I’ve gotten pericarditis like 3-4 weeks after I was sick and it was terrible and had real bad chest pain and it took about 2 weeks to recover.
Though on the heart and any individual it’s hard to say since anything can happen, no matter how healthy you are. Case in point is Colbrelli, he was sick with an infection, came back potentially too soon, and ended up having ventricular fibrillation or pulseless ventricular tachycardia that required him to have the implant incase it occurs again.
Hopefully MVP has no issues and can perform at his best.