Electrophysiological Observations During QRS Alternans in a Patient with Incessant Tachycardia
- 1 April 1988
- journal article
- case report
- Published by Wiley in Pacing and Clinical Electrophysiology
- Vol. 11 (4) , 413-418
- https://doi.org/10.1111/j.1540-8159.1988.tb06000.x
Abstract
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.Keywords
This publication has 7 references indexed in Scilit:
- Benign congenital intracardiac thyroid and polycystic tumor causing right ventricular outflow tract obstruction and conduction disturbanceJournal of the American College of Cardiology, 1987
- Resetting response patterns during sustained ventricular tachycardia: relationship to the excitable gap.Circulation, 1986
- Surgical ablation of ventricular tachycardia: improved results with a map-directed regional approach.Circulation, 1986
- Electrical alternans in wide complex tachycardiasThe American Journal of Cardiology, 1985
- Value of QRS alteration in determining the site of origin of narrow QRS supraventricular tachycardia.Circulation, 1983
- Endocardial excision: a new surgical technique for the treatment of recurrent ventricular tachycardia.Circulation, 1979
- Paroxysmal ventricular tachycardia with rhythmic alternation in direction of the ventricular complexes in the electrocardiogram: Report of two cases and review of the literatureAmerican Heart Journal, 1928