An automatic screening device for auscultatory evidence of heart disease was tested on 308 children and adolescents who had previously had rheumatic fever. The device correctly recognized as abnormal 88.5% of 131 patients with rheumatic heart disease (RHD), and correctly recognized as normal 83.6% of 177 patients with no RHD. For purposes of comparison a cardiologist, an internist, and a senior medical student each listened while blindfolded to the heart sounds of three 100-patient subsets of the above population. The auscultation was limited to the areas used for the automatic screening. They correctly recognized as abnormal 97.9%, 94.5%, and 91.9% of the patients with RHD, and correctly recognized as normal 81.1%, 84.4%, and 85.7% of the patients without RHD.
JAMA – American Medical Association
Published: Nov 20, 1967