Objective To study the risk factors and heart functions of young patients with acute coronary syndrome(ACS) and the relationship between the criminal arteries and age.Methods Two hundred and thirty-six patients with ACS and 54 normal cases from January 2005 to December 2006 were evaluated.ACS patients were further divided into young patients group(under 55 years old) and elder patients group(above 55 years old).Several parameters such as plasma lipids,glucose,brain natriuretic peptide(BNP),heart structure a...