Abstract
THE advent of photofluorography has made possible the radiologic screening of the chests of millions of persons each year. Although this method has been largely applied to tuberculosis case finding, many cardiovascular abnormalities have also been detected by this procedure. Since diseases of the cardiovascular system are responsible for an increasingly large number of deaths each year, efforts have been made to determine the potential usefulness of chest photofluorography as a means of detecting persons with cardiovascular disease, with the assumption that patients found in routine surveys might be benefited more by appropriate treatment than those seeking medical care because . . .

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