Figure 3From: Relationship between mechanical dyssynchrony and intra-operative electrical delay times in patients undergoing cardiac resynchronization therapyLeft Ventricular Lead Localization. Biplane venograms (A, C) and lead localizing biplanes (B, D) were used to map LV pacing lead locations (black circle) onto the AHA 17-segment model (E). LAO images were used to determine the circumferential location while RAO images were used for longitudinal position. Mechanical delay times in a region surrounding the lead location (shaded region) can be determined directly from the 17-segment model (F).Back to article page