Synthetic mRNA based vaccine induces heart damage is not a binary concept (i.e. you either have it or not), but depends on the amount of cardiac cells attacked and destroyed by the immune system due to exposing the spike protein. People develop problems many weeks after vaccination, here are exemplary case reports (excluded from the FDA funded garbage study):
* "18 days after his second dose": https://onlinelibrary.wiley.com/doi/epdf/10.1111/pace.14486
* "chest pain one week after second dose": https://www.jstage.jst.go.jp/article/internalmedicine/advpub...
* "chest pain 2 weeks after mRNA vaccination": https://www.nejm.org/doi/pdf/10.1056/NEJMc2109975