Premium
Electrophysiological Observations During QRS Alternans in a Patient with Incessant Tachycardia
Author(s) -
ELLENBOGEN KENNETH A.,
ROGERS REGINA R.,
SZENTPETERY SZABOLCS
Publication year - 1988
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/j.1540-8159.1988.tb06000.x
Subject(s) - medicine , cardiology , qrs complex , tachycardia , procainamide , electrophysiology , ventricular tachycardia , electrical conduction system of the heart , electrophysiology study , electrocardiography , anesthesia , bundle of his , atrial fibrillation , catheter ablation
Electrophysiological observations during preoperative and intraoperative study of a 46‐year‐old patient with incessant ventricular tachycardia and QRS alternans demonstrated a potential mechanism for this electrocardiographic finding. During QRS alternans, conduction delay (or block) was recorded from the site of origin of the tachycardia, high on the anterior septum to the His bundle: After procainamide infusion, the tachycardias slowed and, concurrent with the disappearance of QRS alternans, conduction from the site of tachycardia origin to the His bundle could no longer be demonstrated.