The writing committee also put the procedure in the context of patients longitudinal disease process. Specifically, they considered that procedural quality must extend beyond the laboratory and should involve implementation of appropriate secondary prevention cardiac rehabilitation and medications to modify long-term risk. Finally, the writing committee considered other indicators of quality related to the interventionalist and the institution. These measures include such factors as proce- dural volume and whether the institution routinely tracks and benchmarks their care relative to others in clinical registries. Combined, these PCI metrics break important new ground. As noted by the authors, the field of quality assessment and performance measurement in PCI is maturing, and many advances are still needed. Nevertheless, this initial metric set provides a solid foundation for quality improvement in the field and sets the stage for future advancement. Eric D. Peterson, MD, MPH, FACC, FAHA Chair, ACC/AHA Task Force on Performance Measures The ACC/AHA/SCAI/AMA-PCPI/NCQA Percutaneous Coronary Interventions Performance Measures Writing Committee (the writing committee) was charged with creating the first performance measure set in this area. In this measure set, the writing committee presents 11 measures, which are intended for ambulatory and hospital (inpatient) settings. The measure set is summarized in Table 1. 1.1. Scope of the Problem The ACC/AHA/SCAI/AMA-PCPI/NCQA 2013 PCI perfor- mance measurement set, which is available on the PCPI Web site at http://www.ama-assn.org/apps/listserv/x-check/qmea- sure.cgi?submit=PCPI, discusses in detail the scope of the problem and opportunities for improving the quality of care provided to patients undergoing PCI. 1.2. Structure and Membership of the Writing Committee The members of the writing committee included clinicians specializing in interventional cardiology, general cardiology, internal medicine, cardiac surgery, and cardiac rehabilitation, as well as individuals with expertise in guideline development and performance measure development, implementation, and testing. 