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Figure 7 Three-Dimensional Scar Map Displaying Epicardial Scar

Endocardial voltage map was unable to detect myocardial scar, and all wall segments revealed >1.5 mV voltage (left lateral view, A). However, 3-dimensional positron emission tomographic scar map (ocher shell) reveals a large inferobasal lateral wall defect signifying myocardial scar, which was consistent with the exit site of the presenting ventricular tachycardia (white arrow, B). An epicardial voltage map finally confirmed a large, nontransmural scar (red area, <0.5 mV) in the inferobasal lateral location (white arrow, C). Registration of the epicardial voltage map and 3-dimensional positron emission tomographic scar map demonstrates good correlation between the epicardial voltage-defined scar and the positron emission tomographic-defined scar.