Many studies were compatible with our finding that the SAA level was significantly higher in both the stable angina and acute myocardial infarction groups than the control group (2.7179 ± 0.44501 mg/L). Also, we compared the SAA level in stable angina versus the SAA level in AMI, and there was a significant difference between them (P-value=0.0). According to these results, we conclude that serum amyloid A protein is the best marker of both stable angina and AMI. The gene discussed is SAA1; the disease is angina pectoris.