Annual Hospital PCI Volumey U *For comprehensive information on these measures, including measure exceptions, please refer to the complete ACC/AHA/AMA-PCPI/NCQA/SCAI performance measurement set through the PCPI Web site (http://www.ama-assn.org/apps/listserv/x-check/qmeasure.cgi?submit PCPI). yThese measures are performance measures. zIndicated in shading, these measures have been designated quality metrics and are for use in internal quality-improvement programs only. They are not appropriate for any other use (e.g., pay-for-performance, physician ranking, public reporting programs). ACC indicates American College of Cardiology; AHA, American Heart Association; AMA-PCPI, American Medical Association Physician Consortium for Performance Improvement; NCQA, National Committee for Quality Assurance; PCI Percutaneous Coronary Intervention; and SCAI, Society for Cardiovascular Angiography and Interventions. Nallamothu et al. JACC Vol. 63, No. 7, 2014 ACC/AHA/SCAI/AMA-PCPI/NCQA February 25, 2014:722 45 monitoring of disease status were selected as the relevant dimensions of care for PCI performance measures. In addition, to ensure the measure set would be as comprehensive as possible, the writing committee evaluated the potential measures against the Institute of Medicine domains of healthcare quality (safety, effectiveness, patient- centeredness, timeliness, ef ciency, and equity) (3). The writing committee focused primarily on processes of care, but they also considered structural and outcome measures for PCI. Although the writing committee cannot endorse speci c measures developed by others and believes that many measures are needed to quantify the full spectrum of relevant healthcare dimensions of quality, the measures proposed in the present set are intended to complement existing National Quality Forum endorsed PCI measures. 2.3. Literature Review The practice guidelines and other clinical guidance docu- ments that provided the basis for these measures can be seen in Table 3. 2.4. De nition and Selection of Measures The writing committee reviewed both recent guidelines and other clinical guidance documents, such as the ACCF/ Appropriate Use Criteria for Coronary Revascularization (11). 