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Ventriculoatrial Block and His-His Changes During Supraventricular Tachycardia Diagnostic and Mechanistic Implications
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https://doi.org/10.1016/j.jaccas.2022.08.010Abstract
Supraventricular tachycardia (SVT) with ventriculoatrial (VA) block can represent a diagnostic challenge. We present a case of SVT where His-His interval shortening was repeatedly observed during episodes of VA block. This novel observation is more diagnostically suggestive of atrioventricular nodal re-entrant tachycardia, as opposed to orthodromic re-entry using a nodofascicular or nodoventricular pathway where a constant His-His is recorded during episodes of VA block. (Level of Difficulty: Intermediate.).
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