Premium
Unusual Electrocardiographic Findings Associated with Type A Wolff‐Parkinson‐White Syndrome
Author(s) -
KUGA KEISUKE,
YAMAGUCHI IWAO,
YOSHIZAWA KAZUO,
KURUSU TAKEO,
TOGO TOSHIHITO,
SUGISHITA YASURO
Publication year - 1993
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.1540-8159.1993.tb01826.x
Subject(s) - medicine , qrs complex , cardiology , accessory pathway , wpw syndrome , tachycardia , electrocardiography , left bundle branch block , supraventricular tachycardia , electrical conduction system of the heart , paroxysmal tachycardia , electrophysiology , atrial fibrillation , catheter ablation , heart failure
A 50‐year‐old woman with Wolff‐Parkinson‐White (WPW) syndrome presented with unusual electrocardiographic (ECG) findings following the termination of paroxysmal supraventricular tachycardia. The ECG showed three different QRS complexes and irregular R‐R intervals. These QRS complexes consisted of: (1) narrow QRS; (2) wide QRS with delta wave; and (3) wide QRS with left bundle branch block (LBBB). The mechanisms of these findings, revealed by electrophysiological study, were: (1) intermittent anterograde left‐sided accessory pathway conduction; (2) rate‐dependent ipsilateral LBBB; and (3) intermittent retrogradely conducted atrial echoes that occurred due to intraventricular conduction delay resulting from LBBR. Cases of WPW syndrome with these unusual ECG findings, which were clearly interpreted by electrophysiological study, are rare.