Serum triglycerides (TG), cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and apolipoproteins AI, B100, CI, CII and CIII were analyzed in 142 patients with coronary heart disease (CHD) and 64 age-matched healthy subjects in the Chengdu area. Significantly increased TG and decreased HDL-C were found in the CHD patients (P less than 0.001). Serum apo AI and CII were significantly decreased in the CHD patients compared with the normal subjects (P less than 0.01 or P less than 0.001). Serum apo B100 and CIII were slightly higher in the CHD group than in the normal group (P less than 0.001 or P less than 0.05). No significant differences were observed in apo CI levels in the CHD patients when compared with the normal subjects. The results were discussed.