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Figure 3 Color-Coded Isopotential Maps of Spontaneous Rhythm

(A to F) The presumed areas of low voltage identified by dynamic substrate map have been encircled (patient, view, and labels as in Fig. 2). Right ventricular activation is displayed in colors on the isoelectric (purple) endocardial surface. The red tracking virtual (yellow arrow in D) reflects the peak negative voltage. Black arrows reflect the propagation pattern of the endocardial activation. Right ventricular depolarization runs from the superior-basal aspect of the right ventricle (A) in a superior and inferior direction, with block of conduction along the presumed areas of low voltage at the anterior aspect of the anterior right ventricular wall (B and C), moves further posteriorly around the right ventricle outflow tract (D) to the septum, and finally reaches again the anterior right ventricle basal wall (E and F). Abbreviations as in Figure 2.