MMP9 and Arrhythmia: LPS-stimulated iPSC-aCMs showed arrhythmias, abnormal Ca2+ signaling, reduced cell viability, disrupted microtubule network and increased α-tubulin degradation. VEGFA, EGFR, MMP9 and CCL2 were identified as hub genes simultaneously targeted in the EAT and RAA of POAF patients.