Narrowed Right Bundle Branch Block Pattern in Tachycardia
Zhi Luo1, Yi Liu2, Yuwei Chen2
1Department of Cardiovascular Medicine, The People's Hospital of Jianyang City, Jianyang, China.
Abstract:
A 66-year-old man with 5-year intermittent palpitation underwent an electrophysiologic (EP) study. Electrocardiograms (ECGs) on admission showed sinus rhythm with right bundle branch block (RBBB). During palpitation, regular tachycardia with RBBB occurred. Through detailed analysis, the diagnosis of Wolff-Parkinson-White (WPW) syndrome with orthodromic atrio-ventricular reentry tachycardia (AVRT) was established. The case emphasizes the significance of comparing sinus rhythm and tachycardia ECGs for accurate diagnosis.
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