This case report describes the rare coexistence of complete infra-Hisian block, WPW syndrome, and Mobitz Type II Kent bundle block in a patient presenting with syncope.
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Alerts clinicians to rare dual conduction blocks in syncope; leaves open whether EP findings guide therapy in this entity.
MOSSUTI, E., ET AL.: Coexistence of Complete Infra‐Hisian Block, WPW Syndrome and Mobitz Type II Kent Bundle Block. A 65‐year‐old patient with a chief complaint of syncope had an ECG with ventricular preexcitation and intermittent second‐degree atrioventricular [AV] block. AV conduction was maintained by the accessory pathway only, with no evidence of AV nodal conduction. Electrophysiological study demonstrated that the QRS duration and morphology did not increase with atrial pacing; however, A‐H prolongation occurred with increased pacing rates.
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Mossuti et al. (1990) studied this question.
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