Previous study has mentioned stroke as a common complication of CHD.23 The identified specific risk factors in such patients are listed as arrhythmias, cardiac failure, polycythemia, inflammation and increased platelet activation during surgery.24,25 Giglia et al have shown the reduced levels of Protein C and AT and presence of hypercoagulability linked genetic polymorphisms like factor V Leiden and prothrombin gene 20,210 in these patients.26 This evidence concerns the gene F5 and polycythemia.