Abstract
To the Editor.— We found the study by Eagle et al 1 using dipyridamole-thallium scanning to evaluate cardiac preoperative particularly relevant to our field of endeavor—anesthesiology. However, for those interested in the historical development of a index for preoperative patients, we would like to correct three points about the risk classification developed by the Dripps—American Surgical First, it is not a classification at all. Second, it was not developed by Dr Dripps. Third, it had nothing to do with the American Surgical Association. A classification of preoperative health or physical status was proposed under the auspices of the American Society of Anesthesiologists, not the American Surgical Association, in 1941 by Drs Saklad, 2 Rovenstine, and Taylor. This classification was not then nor is it now a classification of risk. Its purpose was to facilitate the tabulation of statistical data in anesthesia. It was hoped that classifying patients
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