Objective To study the microcosmic differentiation of phlegm-retention syndromes of coronary heart disease. Methods The clinical epidemiological investigation method was applied to observe the TCM syndrome distribution of coronary heart disease and to analyze the relation between the phlegm-retention syndrome of coronary heart disease and the blood sugar, insulin, blood fat and hemorheology indices. Results The abnormal blood fat was proved to be the material base of the syndrome of phlegm-retention in heart vessels; the abnormal hemorheological index was proved to be the material base of the ...