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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 f20_11_20670

©2013 UpToDate ® Print Email 12-lead electrocardiogram (ECG) of a left lateral accessory AV pathway Electrocardiogram in sinus rhythm from a patient with the Wolff-Parkinson-White syndrome shows a maximally preexcited QRS. The PR is short, the QRS has a right bundle branch block morphology, there is a prominent RS complex in V1, the QRS is negative, and the delta wave is isoelectric in leads I and aVL, localizing the accessory pathway to the left lateral annulus.