. The heart and the aorta; studies in clinical radiology . to superimpose the tracings inorder to read the changes in volume. The list of succes-sive measurements of areas and diameters explainsequally well the anatomical pathological variations in theheart volume. Increases in the heart as a whole are met with espe-cially in the course of infectious diseases: diphtheria,pneumonia, typhoid fever (Dietlen). They are particu-larly important in cases of myocarditis. Fig. 32 showsthe successive contours of the shadow of the heart in aman of forty-four with very severe alcoholic myocarditis,benefit
. The heart and the aorta; studies in clinical radiology . to superimpose the tracings inorder to read the changes in volume. The list of succes-sive measurements of areas and diameters explainsequally well the anatomical pathological variations in theheart volume. Increases in the heart as a whole are met with espe-cially in the course of infectious diseases: diphtheria,pneumonia, typhoid fever (Dietlen). They are particu-larly important in cases of myocarditis. Fig. 32 showsthe successive contours of the shadow of the heart in aman of forty-four with very severe alcoholic myocarditis,benefited by intravenous injections of strophanthine3The line in dots and dashes gives the image of the heartbefore treatment; the dotted line, the result after the firstinjection; the black line shows the cardiac shadow when 12 Dietlen, Munch. Med. Woch., 6 October, 1908. 13 Vaquez et Leconte, Les injections intra-veineuses de strophantine dansle traitement de 1 insuffisanee eardiaque. (Soc. med. des hopitaux, 26 mars,1909.) HEART IN THE PATHOLOGICAL STATE 63. Fig. 32. ALCOHOLIC MYOCAEDITIS By comparing the three superimposed tracings marked by different lines,one can follow the progressive decrease in the volume of the heart undertreatment. The tracing in black lines was taken the day the patient leftthe hospital. finally, three months later, the patient left the hospitalcured. The diameters and areas were: Area Longitudinal Diameter in cm. Horizontal Diameter in cm. October 29, 1908 November 4, 1908January 28, 1909 168om2159cm2132em2 cm. cm. cm. 18. cm. PARTIAL MODIFICATIONS The ascertaining of partial modifications in the volumeof the heart is more important than determining modifi-cations in the heart as a whole, for valuable informationis had as to the reaction of the different cavities of theorgan upon its organic lesions. 64 THE HEART AND THE AORTA I. DETERMINATION OF THE TOTAL VENTRICULARVOLUME The increase in volume of the two ventricles is sho
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