Objective:To observe the relationship between syndrome differentiation of phlegm & blood stasis and expression of platelet derived growth factor A(PDGF A) mRNA of peripheral blood mononuclear cell (PBMC) in coronary heart disease (CHD). Method: 30 cases of CHD were randomly divided into 3 groups, namely, group 1 with syndrome of non phlegm and non blood stasis, group 2 with syndrome of stagnation of phlegm in blood vessel, group 3 with syndrome of co obstruction of phlegm & blood stasis. Each group contained 10 patients. At the same time, 10 he...