Heart failure was significantly associated in chemotherapy compared to PD-(L)1, OR = 0.50 (95% CI 0.37–0.69, q <  0.001), CTLA4, OR = 0.08 (95% CI 0.03–0.20, q <  0.001), and combination immunotherapy, OR = 0.25 (95% CI 0.13–0.48, q <  0.001). Here, CTLA4 is linked to heart failure.