ERBB2 and subacute bacterial endocarditis: In situ and ipsilateral SBE incidence data also reached similar conclusions: the HER2 overexpression subtype exhibited the highest incidence of SBEs, the luminal A subtype showed the lowest incidence of SBEs, and the SBE incidence of luminal B subtype was in‐between luminal A and HER2 overexpression.