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Figure 6 Patient with WolffParkinsonWhite syndrome (type B). Short-axis view of the left ventricle at level of mitral valve orifice. (A) At the delta wave, abnormal onset of ventricular acceleration (arrow, yellow point) was at the subendocardium of the right ventricular posterior wall. (B) At early systole, the initial ventricular acceleration had extended (red area).
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