The Relation of Age to Certain Electrocardiographic Responses of Normal Adults to a Standardized Exercise

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Abstract
To demonstrate what may be expected in individuals who do not show clinical evidences of heart disease, the authors present a quantitative evaluation and physiologic interpretation of data obtained from 60 male subjects. Age differences are described. Decreases in S-T and in T occurred in most subjects. The S-T depression is not necessarily ascribable to injury, and no discontinuity of distribution is discovered to justify calling any of the observed responses "abnormal." The results emphasize the limitations to interpretation of information which is not highly specific, in subject material where no primary standard of diagnosis has been established.