Background Stenting has become an important means for the treatment of Coronary Heart Disease (CHD).DES shows a bright future in clinical application.However, two aspects of the problem after PCI should not be ignored; on the one hand, stent restenosis is an important problem is still not resolved.The other hand, non-stents coronary atherosclerotic lesion may progress.Stent restenosis and non-stents coronary atheroselerotie lesion progression occurs by different mechanisms, each influencing factors may also be different.We are trying to find their respective influencing factors,and help us do the secondary prevention.