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Article
November 1925

VITAL CAPACITY, RESPIRATORY FREQUENCY, PULSE RATE AND SYSTOLIC BLOOD PRESSURE IN HEART DISEASETHEIR IMPORTANCE IN THE CLASSIFICATION OF PATIENTS

Arch Intern Med (Chic). 1925;36(5):628-635. doi:10.1001/archinte.1925.00120170037003
Abstract

A satisfactory classification of patients with organic heart disease based on their ability to carry on physical activity would be of great value to every clinician. It is our purpose in this article to show that the consideration of the vital capacity of patients with heart disease, together with their respiratory frequency, pulse rate and systolic blood pressure, after climbing 30 feet of stairs in forty seconds divides them into three main groups. The form of exercise test used in this study differs entirely from that type of test in which the individual is exercised until dyspnea first appears, in that a definite time and weight lifting task is accomplished. In this study the reaction of the individual to a definite task is noted instead of only the amount of work that may be done to bring about dyspnea in the individual. It is hardly necessary to state that the

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