Plasma lipoproteins in coronary artery disease.

1. To investigate the association between post translational forms of circulating plasma lipoproteins, beta-2-glycoprotein I, HDL and ApoB100, and atherosclerotic coronary disease. 2. To investigate the association between post translational forms of circulating plasma lipoproteins, beta-2-glycoprotein I, HDL and ApoB100, and clinical presentation with atherothrombotic acute coronary disease. 3. To investigate the association between post translational forms of circulating plasma lipoproteins, beta-2-glycoprotein I, HDL and ApoB100, and complications after percutaneous coronary intervention and late graft failure after CABG. The patients having angiography or CT angiography, a 15 ml blood sample shall be collected at the time of procedure. Out of this group, the patients who did not have ACS and have stent implantation shall have second blood sample 3 hours post procedure. The patients presenting with ST elevation myocardial infarction will have collection of only one blood sample 24 hours after the stent implantation. Clinical follow up shall be performed by phone interview at 30 days 12 months and at 2 years.