Pilot Protocol After completion of each PCI, the required information is entered online into the NCDR® CathPCI Registry v.4.3 and v.4.4 UCD server. All cases are then reviewed by the central coordinating site for data field completion and data consistency. All cases with complications [death, stoke, CABG, shock, congestive heart failure (CHF), cardiac arrest, IABP (intra-aortic balloon pump), perforation, significant dissection, tamponade, and new requirement for dialysis] and a randomized 10% of non-complication cases are then selected for a pilot-site audit that includes a review of all medical records and angiographic images. Audit reviews produce multiple queries that are transmitted to the hospital coders for discussion with operators. An iterative process eventually leads to a consensus agreement in most cases. In rare cases, when auditor-operator agreement is not achieved, the case is referred to the angiographic committee or to the AOC for a final determination. The patient and procedure data is stored on the Velos Server; the angiographic images are saved on an Xcelera R3.3L1 Server (Koninklijke Philips Electronics N.V.); and the statistical analyses are stored and performed on SAS software, version 9.3 for Windows (SAS Institute, Cary, NC).