1. Systemic Sarcoidosis and Cardiac Conduction Abnormalities
Eric E. Harrison, M.D., Hugh M. Martin, M.D. 
CHEST 
Volume 80, Issue 4, (October 1981)
DOI: /chest
Copyright © 1981 The American College of Chest Physicians Terms and Conditions

2. Figure 1
His bundle electrogram shows A-V dissociation with high grade block above the His bundle. HV time was 56 msec. HBE = His bundle electrogram; A = atrial deflection; V = ventricular deflection; H = His bundle deflection.
CHEST  , DOI: ( /chest )
Copyright © 1981 The American College of Chest Physicians Terms and Conditions