Antibody May Raise Heart Attack, Stroke Risks: Lupus anticoagulant said to be ‘a major risk factor for arterial thrombotic disease’ in young women.

The presence of lupus anticoagulant, an antiphospholipid antibody, increased the risk of stroke by 40-fold and of heart attack by 5-fold in a Dutch study that compared young women who had survived these conditions with a healthy control group.