Abstract:Objective To investigate the correlation between glycosylated hemoglobin (HbA1c), homocysteine (Hcy) and coronary artery lesions in middle-aged and elderly patients with acute coronary syndrome (ACS). Methods A total of 515 middle-aged and elderly patients with ACS were divided into single-vessel and multi-vessel groups according to coronary angiography, and mild and moderate/severe groups based on Gensini scores. The correlation between HbA1c, Hcy and coronary artery lesions was evaluated by Pearson correlation analysis. Results HbA1c and Hcy levels were lower in single-vessel and mild ACS groups than in multi-vessel and moderate/severe ACS groups (P<0.01 or 0.05). There were positive correlations between HbA1c and multi-vessel lesions (r=0.103, P<0.05) and between Hcy and moderate/severe ACS (r=0.164, P<0.01). Conclusion HbA1c and Hcy could be respectively contribute to multi-vessel lesions and moderate/severe ACS in middle- aged and elderly patients.