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Fig. 1 | International Journal of Arrhythmia

Fig. 1

From: A case of infra-nodal Wenckebach conduction block with alternating bundle branch block

Fig. 1

a. Rapid atrial pacing at 280 ms produced infra-nodal Wenckebach conduction block followed by an alternating bundle branch block with a resumption of 1:1 AV conduction. b. Illustration of laddergram and diagrammatic representation of linking phenomenon and gap phenomenon of panel a. Noted the long-short cycle sequence in the bundle branches produces an alternating bundle branch. The duration intervals are in milliseconds. A indicates atrium; AVN, AV node; BB, bundle branches; LBB, left bundle branch; RBB, right bundle branch; V, ventricles. See detailed discussion in the text

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