Profile of prothrombotic factors in Indian children with ischemic stroke.

This study was undertaken in view of paucity of data regarding the profile of prothrombotic factors in children with ischemic stroke. Sixty-four children with ischemic stroke were prospectively evaluated for prothrombotic factors over a 2 year period. The blood samples were analyzed for protein C (PC), protein S (PS), activated protein C resistance (APCR), factor V Leiden (FVL), anti-thrombin-III (AT-III), lipoprotein (a) [Lp(a)], lupus anticoagulant (LA), anti-cardiolipin antibodies (aCL) immunoglobulin (Ig) M and IgG, homocysteine, and methylenetetrahydrofolate reductase (MTHFR) at least 3 months after the onset of stroke. At least one prothrombotic factor was identified in 45.3% children (29/64). These included hyperhomocysteinemia (11/64), PC deficiency (9/64), aCL (8/64), PS deficiency (5/64), APCR (3/64), AT-III deficiency (2/64) and LA (1/64). Multiple factors were coexistent in 17.2% (11/64). The prevalence of PC deficiency, PS deficiency and co-existence of multiple abnormalities observed were similar to the published literature. Elevated Lp(a) and APCR were less prevalent. FVL and MTHFR were not seen in any of the study children. Forty-five percent of children had at least one prothrombotic abnormality. Hyperhomocysteinemia, PC deficiency, aCL and PS deficiency were the most frequent prothrombotic abnormalities.