. The Röntgen rays in medical work . left side. Theright border of the left heart-shadow, which was parallel with theright border of the vertebral column during expiration, disappearedbehind the vertebral column on deep inspiration. Eadioscopy thus showed left pulmonary sclerosis, most marked atthe summit, with mediastinal adhesions; sclerotic mediastinitis? * Radioscopie et Radiographic Cliniques, Dr. Regnier. Bailliere, Paris,1898. f Medical Review, 1902, p. 353. % Bull, de Soc. des Hop. de Lyons, p. 85, 1902. § Op. cit., 1902, p. 89. || Bulletin de la Soc. Med. des Hop., p. 132, 1902. 328 T
. The Röntgen rays in medical work . left side. Theright border of the left heart-shadow, which was parallel with theright border of the vertebral column during expiration, disappearedbehind the vertebral column on deep inspiration. Eadioscopy thus showed left pulmonary sclerosis, most marked atthe summit, with mediastinal adhesions; sclerotic mediastinitis? * Radioscopie et Radiographic Cliniques, Dr. Regnier. Bailliere, Paris,1898. f Medical Review, 1902, p. 353. % Bull, de Soc. des Hop. de Lyons, p. 85, 1902. § Op. cit., 1902, p. 89. || Bulletin de la Soc. Med. des Hop., p. 132, 1902. 328 THE RONTGEN RAYS IN MEDICAL WORK with pericardial adhesions; traction of the large vessels, particularlyof the pulmonary artery to the left. As a physical sign, the medias-tinal displacement during inspiration is pathognomonic. It can bedemonstrated by light percussion, but radioscopy is the only trust-worthy test. Sinistrocardia has rarely been met with, and dextrocardia isrelatively uncommon. Their recognition is, however, of much. Fig. 161.— J. Garel. importance with regard to prognosis, as, when once the condition isestablished, little compensation can be provided, and cardiac failureand arrest soon prove fatal. By the courtesy of the Medical Review we are enabled to presentthe original outlined illustration of the heart displacement (Fig. 162). Reported Action of X-Rays upon the Heart.—Mr. BezleyThorne* has made an interesting observation in relation to cardiac * British Medical Journal, vol. ii., p. 1238, 1896. MEDICAL AND SURGICAL APPLICATIONS 329 radiography. He noticed that the heart shrank visibly after thirtyminutes exposure to the Rontgen rays. In one case the lesseningamounted to no less than 2 inches in the long axis of the viscus, andlh inches in the short diameter. There may, of course, he somefallacy involved in this observation. For instance, it is known thatincreased exposure to the rays or an alteration of current in manycases means great
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