> No patient had ECG- changes, and none developed major adverse cardiac events within 30 days.

Which aligns with

> We found that across this large dataset, the entire COVID-19-vaccinated population of England during an important 12-month period of the pandemic when the COVID-19 vaccines first became available, the risk of myocarditis following COVID-19 vaccination was quite small compared to the risk of myocarditis after COVID-19 infection. [0]

[0] https://www.ahajournals.org/doi/full/10.1161/CIRCULATIONAHA....