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What is known and Objective:  Intravenous immunoglobulin (IVIg) is a commonly used therapy for autoimmune disease, but may cause chronic hypertension and thrombosis. We determined whether: (i) IVIg systematically affects blood pressure in the short term; (ii) acute changes in plasma viscosity because of IVIg correlate with blood pressure effects; (iii) effects of IVIg on acute blood pressure are related to baseline blood pressure or hypertension status and (iv) IVIg influences plasma markers of inflammation, anticardiolipin antibodies and homocysteine as additional putative prothrombotic risk factors.

Methods:  Twenty adults with autoimmune neurological disease who received a course of IVIg were evaluated immediately before and after each infusion, on every day of the course. Blood pressure, pulse and the following haematological parameters were determined: plasma viscosity, erythrocyte sedimentation …