1. Volume 13, Issue 1, Pages 226-232 (January 2016)
Painful left bundle branch block syndrome: Clinical and electrocardiographic features and further directions for evaluation and treatment 
Alexei Shvilkin, MD, PhD, Ethan R. Ellis, MD, Ernest V. Gervino, ScD, Anthony D. Litvak, MD, Alfred E. Buxton, MD, Mark E. Josephson, MD 
Heart Rhythm 
Volume 13, Issue 1, Pages (January 2016)
DOI: /j.hrthm
Copyright © 2016 Heart Rhythm Society Terms and Conditions

2. Figure 1
Single precordial lead tracings for cases 1–4 and an example of chronic left bundle branch block (LBBB) with a calculated S/T wave ratio shown for each. A single precordial lead tracing of chronic LBBB is also shown for comparison (leads V2–V3, 25 mm/s, 10 mm/mV).
Heart Rhythm  , DOI: ( /j.hrthm )
Copyright © 2016 Heart Rhythm Society Terms and Conditions