ITK and atrial fibrillation: Theoretically, we may agree with the higher inhibition effects of Ibrutinib in HER2, HER4, TEC (mainly related to AF) (62) and fewer off-target effects of Zanubrutinib with lower IC50 against BTK (mainly related to the treatment of lymphoma) and higher IC50 for other kinases like EGFR(21nM), TEC(44nM), ITK(50nM) (63).