Jonathan M. Behar et al. JACEP 2017;j.jacep

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Presentation transcript:

Jonathan M. Behar et al. JACEP 2017;j.jacep.2017.01.018 Case Example With CMR-Derived Target Segments, 3D Shell Fusion With X-Ray, and Targeted LV Lead Placement (A) Prototype guide CRT platform. Left ventricular (LV) volumes, scar burden, and dyssynchrony indices, as described in Figure 2. Myocardial scar is localized to the posterolateral region. Target segments are selected (basal and mid-anterior, mid-anterolateral, and mid-inferior). EDV = end-diastolic volume; EF = ejection fraction; ESV = end-systolic volume; SD = standard deviation; SV = stroke volume. (B) The CMR-derived 3D shell with selected target segments in green is demonstrated alongside the fiducial markers, as displayed through time-resolved angiography. (C) Left upper panel showing large anterior target segment and anterior vein. Left lower panel showing smaller inferior target segment and vein identified. Right upper panel showing the attempted positioning of LV lead in an anterior vein; however, the lead was unable to track distally and was unstable without any demonstrable biventricular capture. Subsequent positioning in a posterolateral vein (within the area of scar as shown in red). Right lower panel showing lead positioning in inferior target (poles within green area). (D) QLV (sensed electrical latency) from LV lead positioned in posterolateral vein within scar (QLV 107 ms) and biventricular paced QRS duration of 143 ms (upper panel). Electrical parameters were more favorable with LV lead with poles within target area, out of scar (QLV 125 ms, paced QRS duration 119 ms) (lower panel). Abbreviations as in Figure 1. Jonathan M. Behar et al. JACEP 2017;j.jacep.2017.01.018 2017 The Authors