This case report highlights a rare spontaneous expression of dual atrio-His conduction resulting in complex AV conduction patterns.
Dual intranodal pathways are not uncommonly demonstrated at electophysiological study especially in patients with intranodal re-entrant tachycardias. This type of tachycardia is the most common spontaneous manifestation (albeit indirect) of dual AV nodal pathways. Other forms of spontaneous expression of dual atrio-His conduction are rare. In this report we describe a patient who exhibited complex atrioventricular conduction patterns over two intranodal pathways.
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Ward et al. (1983) studied this question.
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