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Unchanged QRS morphology with atrial pacing in a case of WPW syndrome: What is the mechanism?
Author(s) -
Tutuianu Cristina,
Saghy Laszlo,
Pap Robert
Publication year - 2019
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/pace.13576
Subject(s) - medicine , qrs complex , cardiology , wpw syndrome , accessory pathway , electrophysiology , ventricular pacing , atrial fibrillation , heart failure , tachycardia , catheter ablation
We present the case of a 55‐year‐old female who presented for a short episode of palpitation and an electrocardiogram consistent with Wolff‐Parkinson‐White syndrome. She underwent an electrophysiological study showing that during incremental atrial pacing and extrastimulation the stimulus to QRS and QRS morphology stayed constant while the His to ventricular (HV) interval shortened. What can be the explanation for the constant QRS morphology, despite shortening HV during atrial pacing?