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Interesting case of narrow QRS tachycardia. What is the mechanism?
Author(s) -
Mohanan Nair Krishna Kumar,
Namboodiri Narayanan,
Das Debasish,
Valaparambil Ajitkumar
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.13705
Subject(s) - medicine , palpitations , tachycardia , cardiology , qrs complex , electrophysiology study , electrocardiography , accessory pathway , bundle branch block , anesthesia , catheter ablation , ablation
A 67‐year‐old female presented with history of recurrent palpitations. During one of the episodes of palpitation, a narrow QRS tachycardia was recorded and it was reported to be terminated with intravenous adenosine. The 12‐lead electrocardiogram (ECG) showed no manifest ventricular preexcitation. ECG was within normal limits. The patient underwent an electrophysiology study after informed consent. She was taking calcium channel blockers and that was stopped five half‐lives prior to the procedure. As catheters were being placed, a narrow QRS tachycardia got induced. During the study, there was development of right bundle branch block during the tachycardia. What is the mechanism of the tachycardia?