title: Correction.
abstract: In the article by Ristagno et al, “Amplitude Spectrum Area to Guide Defibrillation: A Validation on 1617 Patients With Ventricular Fibrillation,” which was published in the February 3, 2015 issue of the journal (Circulation. 2015;131:478–487. DOI: 10.1161/CIRCULATION AHA.114.010989), the authors wish to report an error in Table V of the online-only Data Supplement. Association of AMSA with defibrillation success was independent of the features of the defibrillators, although the type A and B defibrillators accounted for a significantly higher AUC compared with type C defibrillator. Table V in the online-only Data Supplement has been corrected accordingly. The authors regret this error.(