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Heart diseases remain the primary cause of human mortality in the world. Although conventional therapeutic opportunities fail to halt or recover cardiac fibrosis, the promising clinical results and therapeutic efficacy of engineered chimeric antigen receptor (CAR) T cell therapy show several advancements. However, the current models of CAR‐T cells need further improvement since the T cells are associated with the triggering of excessive inflammatory cytokines that directly affect cardiac functions. Thus, the current study highlights the critical function of heart immune cells in tissue fibrosis and repair. The study also confirms CAR‐T cell as an emerging therapeutic for treating cardiac fibrosis, explores the current roadblocks to CAR‐T cell therapy, and considers future outlooks for research development. Significance statement: The necessity and importance of chimeric antigen receptor (CAR) T cells and their therapeutic efficiency in treating diseases other than cancer, mainly cardiovascular diseases, have emerged in recent years. However, there is still room for advancement in the current models of CAR‐T cell therapy. This paper highlights the evolution and roadblocks of CAR‐T technology at different levels, from technical concerns to clinical outcomes, in an attempt to improve the therapeutic efficiency of CAR‐T cell therapy in this area. [ABSTRACT FROM AUTHOR]