FIGURE 1.

Flowchart of signal processing and computing of the second central moment calculation of R‐wave heterogeneity (RWH) and T‐wave heterogeneity (TWH) in a representative patient with cardiomyopathy with ventricular tachycardia (VT) (left panel), who exhibited greater splay (heterogeneity) than did the patient with cardiomyopathy without VT (right panel). Electrocardiograms were simultaneously obtained from precordial leads V₄, V₅, and V₆. Reprinted with permission from Verrier and Huikuri (2017)