Simple bedside autonomic maneuvers can be used to accurately assess complex conduction disturbances such as coexisting Phase 3 LBBB and WPW.
Bedside autonomic maneuvers may aid complex conduction assessment; leaves open broader applicability without prospective validation.
A 53‐year‐old woman is described with tachycardia dependent block (Phase 3 block) within the left bundie branch and a right‐sided accessory AV bypass tract Simple bedside autonomic maneuvers allowed an accurate assessment of these com‐plex conduction disturbances
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Barold et al. (1982) studied this question.
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