Transient changes in QRS morphology during a narrow complex tachycardia: What is the mechanism?
Özcan Çetin, Elif Hande
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CitationKara, M., Özcan Çetin, E. H., Korkmaz, A., Özeke, Ö., Çay, S., Özcan, F. ... Topaloğlu, S. (2022). Transient changes in QRS morphology during a narrow complex tachycardia: What is the mechanism? Journal of Cardiovascular Electrophysiology, 33(6), 1320-1321. https://doi.org/10.1111/jce.15523
A22‐year‐old man with recurrent episodes of tachycardia inthe absence of structural heart disease underwent an electro-physiological evaluation. A narrow complex tachycardia (NCT)was induced by programmed by ventricular pacing. A transientchange in QRS morphology and H‐V interval in the middle of thetracing was noted during ongoing tachycardia (Figure1). What arethepossiblemechanismsoftachycardia and changes in QRS morphology?