My son was diagnosed w myocarditis w elevated troponin after his 2nd c vax on 11/3. his cmri is now clear, but he is still experiencing all same symptoms: fatigue, chest pain, arrhythmias, rapid heart beat. what could be cause of this?

The details provided are inadequate, especially in the absence of a decription of the degree of troponin elevation. The statement that "His MRI is now clear ",suggests that it was previously abnormal. Given these limitations a detailed history examination and a review of all the test findings are in order before any conclusion. Detailed CLINICAL evaluation should be undertaken with all test data.

My hunch is that it is "long COVID-19" but check with your Mo Dr who will know what is going around there. Remind those in MO that more need to get vaccine for COVID-19 to stop the pandemic. Good luck.

In view of these ongoing symptoms I would expect abnormalities to be present in his EKG and echocardiogram which would indicate some degree of myocardial damage from his myocarditis. If his cardiac monitoring demonstrates actual cardiac arrhythmias, this would also be caused by cardiac damage. However,his treating cardiologist,knowing his cardiac status as well as all test results is best answer

A change in his condition should be further evaluated by Cardiology. A PCR COVID 19 test is recommended. Other causes include pneumonia. Watch for signs of shortness of breath, swelling and fatigue.