The “2016 AHA/ACC Clinical Performance and Quality Measures for Prevention of Sudden Cardiac Death” Writing Committee (the writing committee) was charged with creating the first comprehensive measure set in this area. In this measure set, the writing committee presents 10 measures that are intended for ambulatory and hos- pital (inpatient) settings or state/municipal use. In developing this measure set, the writing committee established 2 classes of measures: 1) performance, and 2) quality. The Preamble delineated the difference between performance and quality measures. For the purposes of this report, performance measures and quality measures are designated respectively as “PM,” and “QM,” followed by the appropriate measure number. The writing committee considered the development of pediatric measures but decided not to do so for this manuscript as this falls outside of the current task force scope. In a future update, the writing committee may reassess whether separate measures sho...