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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

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contentuptodate· Content· item f15_24_15759

©2013 UpToDate ® Print Email 12-lead electrocardiogram (ECG) of a left anterior lateral accessory pathway Electrocardiogram during atrial pacing in a patient with the Wolff-Parkinson-White syndrome shows QRS complexes that are maximally preexcited. The PR interval is short, there is a right bundle branch morphology, and the axis is rightward. The delta wave is positive in the lateral leads I, avL, and V6, localizing the pathway to the left anterior lateral region. Courtesy of Morton F Arnsdorf, MD.