IF untreated, IF ineffective treatment, THEN tends to progress. The fact that it can be recognized and treated at all is the hopeful part. And I have no doubt that many cases do somewhat resolve themselves since there are so many possible causes and so many people who won't go to a doctor immediately yet later seem all right. I suspect many more than the 1 in a million that was recognized, which means a big unknown population with some unrecognized heart damage, maybe so little it won't matter, maybe enough that one day out of the blue some stressor kills them. I'm not saying any heart symptoms shouldn't be investigated and jumped on immediately and aggressively. Unfortunately it took a known problem, myocarditis, to expose a new problem of vaccine injury. Not trivializing this new myocarditis either as the cause is people turning themselves into spike factories that keep up the irritation. My long haul friend who had COVID but was never vaxxed developed cardiomyopathy with a hardening of inner lining from the disease itself, and didn't get proper diagnosis for months, just disregarded. Now is doing well, though I expect will never be the same. We have to address the spike poison.