ALLAN EUSTIS, B.S., M.D., F.A.C.P.
The importance of determining the functional capacity of the myocardium in organic heart disease has engaged the attention of cardiologists for many years; but in 1922, Brittingham and White,1 after a careful study of the tests then in use, concluded that there was no satisfactory test for cardiac function. During this same year Frost2 arrived at the same conclusion, and at the annual meeting of the Association of Life Insurance Medical Directors of America, he described a new cardiorespiratory test developed in collaboration with Dwight, which was being used by the New England Life Insurance Company in evaluating cardiac cases.
EUSTIS A. The Response of the Cardiovascular System to Respiratory Strain: A Measure of Myocardial Efficiency1. Ann Intern Med. 1932;5:842–857. doi: 10.7326/0003-4819-5-7-842
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Published: Ann Intern Med. 1932;5(7):842-857.
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