Abstract
Summary
Changes in the duration and form of QRS after section of the branches of the Hisbundle are much less pronounced in calves than in dogs. The difference between these two species is attributed to differences in the distribution of the intraventricular conducting system.
The authors wish to express their thanks for the assistance and advice of Dr. F. N. Wilson, University Hospital, Ann Arbor, Michigan, and Dr. E. T. Hallman, Michigan State College, East Lansing. The experimental animals were generously donated by the Dairy Department of Michigan State College.
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