In the article by Shen et al, “2017 ACC/AHA/HRS Guideline for the Evaluation and Management of Patients With Syncope: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society,” which published online March 9, 2017, and appeared in the August 1, 2017, issue of the journal ( Circulation . 2017;136:e60–e122. DOI: 10.1161/CIR.0000000000000499), several corrections were needed. 1. In the table of contents and the corresponding headings in the text, a colon and the word “Recommendations” have been added to headers for the following sections: 3.2., 3.3., 4.1., 4.2., 4.3., 5., 6., and 10. 2. On page e64, in Section 1.2., the first sentence read, “The writing committee was composed of clinicians with expertise in caring for patients with syncope, including cardiologists, electrophysiologists, a neurologist, an emergency physician, and a pediatric cardiologist.” The words “a neurologist” have been deleted. The sentence is updated to read, “The writing committee was composed of clinicians with expertise in caring for patients with syncope, including cardiologists, electrophysiologists, an emergency physician, and a pediatric cardiologist.” 3. On page e64, in Section 1.3., second paragraph, the first sentence read, “This document was approved for publication by the governing bodies of the ACC, AHA, and HRS and was endorsed by the Pediatric and Congenital Electrophysiology Society.” It is updated to read, “This document was approved for publication by the governing …