Kara, MeryemÖzcan Çetin, Elif HandeKorkmaz, AhmetÖzeke, ÖzcanÇay, SerkanÖzcan, FıratAras, DursunTopaloğlu, Serkan2022-12-082022-12-082022Kara, 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.155231045-38731540-8167https://doi.org/10.1111/jce.15523https://hdl.handle.net/20.500.12511/10091A22?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?eninfo:eu-repo/semantics/embargoedAccessAtrioventricular Nodal Reentrant TachycardiaBystanderLower Common PathwayNodofascicularNodoventricularQRS ChangesUpper Common PathwayEditorial3361320132110.1111/jce.15523Q30007940852000012-s2.0-8512991713635524413Q1