title: Reply to the Editor-How do we define fusion on intracardiac electrograms?
authors.affiliation: University of Chicago Medicine, Center for Arrhythmia Care, Heart and Vascular Center, Chicago, Illinois.
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Beaser
authors.affiliation: University of Chicago Medicine, Center for Arrhythmia Care, Heart and Vascular Center, Chicago, Illinois.
authors.forename: Kelvin
authors.initials: K
authors.lastname: Chua
authors.affiliation: University of Chicago Medicine, Center for Arrhythmia Care, Heart and Vascular Center, Chicago, Illinois.
authors.forename: Gaurav
authors.initials: G
authors.lastname: Upadhyay
authors.affiliation: University of Chicago Medicine, Center for Arrhythmia Care, Heart and Vascular Center, Chicago, Illinois. Electronic address: rodericktung@uchicago.edu.
authors.forename: Roderick
authors.initials: R
authors.lastname: Tung
mesh_terms: D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D006801:Humans; D012815:Signal Processing, Computer-Assisted