All recommendations (new, modified, and un- changed) for each updated clinical section are included to provide a comprehensive assessment. The text ex- Table 1. Applying Class of Recommendation and Level of Evidence to Clinical Strategies, Interventions, Treatments, or Diagnostic Testing in Patient Care* (Updated August 2015) CLINICAL STATEMENTS AND GUIDELINES plains new and modified recommendations, whereas recommendations from the previous guideline that have been deleted or superseded no longer appear. Please consult the full-text version of the 2014 AF for text and evidence tables supporting the unchanged recommendations and for clinical ar- eas not addressed in this focused update. Individual recommendations in this focused update will be incor- porated into the full-text guideline in the future. Rec- ommendations from the prior guideline that remain current have been included for completeness, but the LOE reflects the COR/LOE system used when initially developed. New and modified recommendations in this focused update reflect the latest COR/LOE system, in which LOE B and C are subcategorized for greater The section numbers correspond to the full-text guideline sections. 1.1. Methodology and Evidence Review Clinical trials presented at the annual scientific meet- ings of the ACC, AHA, Heart Rhythm Society (HRS), and European Society of Cardiology, as well as other selected data published in a peer-reviewed format through August 2018, were reviewed by the Task Force and members of the 2014 AF Guideline writ- ing group to identify trials and other key data that might affect guideline recommendations. The infor- mation considered important enough to prompt up- dated recommendations is included in evidence tables in the Online Data Supplement. The complete section of recommendations (new, modified, and unchanged) for each clinical section is included to provide a com- prehensive overview for the reader. Recommendations that have been deleted or superseded are not incor- porated. 