Antivimentin/cardiolipin complex antibodies in patients and healthy subjects. The sera of patients with APS, SN-APS, SLE, RA, venous or arterial thrombosis, and of healthy subjects were analyzed by ELISA for the detection of IgG and IgM antivimentin/cardiolipin antibodies. The occurrence of both IgG (A) and IgM (B) antibodies was significantly greater in patients with APS, SN-APS, and SLE compared with healthy donors (P < .0001). Moreover, the occurrence in APS patients was also significantly greater compared with SLE and RA (P < .0001).