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The development and progress of cardiac enlargement in disease of the heart were studied by direct superposition of successive cardiac outlines traced from teleroentgenograms. The conditions investigated were congestive failure, arteriosclerosis, hypertension, disorders of rhythm, myxedema, arteriovenous aneurysm and pericardial effusion. It is obvious that a consideration of cardiac enlargement under these headings is not altogether satisfactory, as several of the conditions might be operative in the individual case. In most instances a single case report serves to show the presence or absence of progressive cardiac enlargement in a given period. The total number of cases from which deductions are made is not given.
The author states that only broad conclusions have been drawn because of the small number of cases investigated. His monograph should stimulate further observations in this field.
The Development of Cardiac Enlargement in Disease of the Heart: A Radiological Study. Am J Dis Child. 1938;55(6):1355. doi:10.1001/archpedi.1938.01980120217026
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