To compare intercellular adhesion molecule-1 ( ICAM-1 ) and vascular cell adhesion molecule-1 ( VCAM-1 ) serum levels between patients with stable ( SAP ) and unstable angina pectoris ( USAP ) undergoing coronary angiography ( CAG ) , investigate effects of CAG on ICAM-1 , VCAM-1 levels in SAP , USAP patients ; probable different effects of non-ionic radiocontrast media ( RCM ) , iso-osmotic iodixanol and low osmolar iopamidol , on these adhesion molecules ( AM ) .