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(Chest. 1971;59:153-159.)
© 1971 American College of Chest Physicians

Evaluation of QRS Criteria in Patients with Chronic Obstructive Pulmonary Disease

Harold M. Silver M.D., F.C.C.P.1 and Juan B. Calatayud M.D.2

1 Associate Clinical Professor of Medicine
2 Associate Professor of Medicine

A group of 173 patients with chronic obstructive pulmonary disease (COPD) was studied by electrocardiogram (ECG) and lung function tests to determine which QRS complex criteria are most useful in diagnosing COPD. Patients were divided into quartiles based on pulmonary function, quartile IV being the most impaired. The best QRS criteria were R V6 amplitude of .5 mv or less and R/S ratio V6 or 1.0 or less, present five times more in quartile IV than I. QRS axis greater than 75° or greater than 90° was present twice as often in quartile IV. The remaining criteria were worthless. The R V6 and R/S ratio V6 were superior to the usually employed frontal plane P amplitude, but inferior to frontal plane P axis. Utilizing the best of both QRS and P criteria insures optimal ECG diagnosis of COPD.






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Copyright © 1971 by the American College of Chest Physicians.