Another extension was received in 2007 with funding concluding in 2012. This study involves the long-term follow-up of participants recruited in 2004 (Wave 4) and 2006 (Wave 5) across 16 medical centers. All subjects will be followed for a total of 5 years and participants from Waves 4 and 5 have already been followed for 3 and 1 years, respectively. Follow-up will be conducted via annual telephone interviews and these data will be used to track the incidence of long-term outcomes. All identified deaths and myocardial infarctions will be reviewed by an adjudication committee to (1) classify cause of death and (2) determine whether or not the myocardial infarction is related to stent thrombosis. The research aims are to: (1) Compare 5-year mortality and myocardial infarction between participants treated with drug eluting stents (DES) versus bare metal stents (BMS) overall, within "high-risk" subgroups, and by "off-label" stent use; (2) Evaluate cardiac and non-cardiac causes of mortality among participants treated with DES versus BMS; (3) Compare 5-year mortality and repeat revascularization by the sirolimus-eluting versus paclitaxel-eluting stent overall, within "high-risk" subgroups, and by "off-label" stent use; and (4) Investigate mechanisms that contribute to stent thrombosis, myocardial infarction, death, and repeat revascularization in participants treated with BMS and DES. In summary, by extending the active NHLBI Dynamic Registry, we will analyze long-term outcome data on several thousand PCI participants treated with BMS and DES.