抄録
A case of inconstant left bundle branch block which appeared during the course of sepsis is reported. The electrocardiogram showed 2:1 intermittent left bundle branch block and then the normal QRS complexes were seen following comparatively shorter R-R intervals among left bundle branch block with atrial fibrillation. The bundle branch block disappeared after alleviation of fever, but the prolonged A-V conduction persisted.
