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(Chest. 1967;52:695-698.)
© 1967 American College of Chest Physicians

QRS Voltage Criteria for Posterior Unipolar Chest Leads in a Normal Population

Herman L. Falsetti M.D.1 and Richard A. Willson M.D.1

1 Department of Medicine, State University of New York at Buffalo and the Buffalo General Hospital and the Department of Medicine, University of Vermont College of Medicine, Mary Fletcher Hospital, Burlington, Vermont

1) The range and upper limit of normal QRS voltage criteria for posterior chest

See Image in the PDF File

leads (V7, V8 and V9) were derived from 50 normal subjects.

2) One third of the study group had a significant Q wave in V9.

3) The mean height of the R wave in V7, V8 and V9 was 7.2 mm, 5.7 mm and 4.1 mm, respectively.






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Copyright © 1967 by the American College of Chest Physicians.