. The heart and the aorta; studies in clinical radiology . Fig. 103 Fig. 104 Fig. 103. SAME CASE, IN EIGHT POSTERIOR OBLIQUE POSITIONNo exaggerated salience of the left auricle (OG). Fig. 104. SAME CASE, IN LEFT POSTERIOR OBLIQUE POSITIONExaggerated salience of the right auricle and ventricle. CONGENITAL AFFECTIONS 14-1 be explained only by the enlargement of the right inferiorarc of the heart, which had a direct relation to the dilata-tion of the right ventricle. Radioscopy allows, therefore,the opportunity to obtain, at the outset, the first signs ofcardiac failure which later developments c
. The heart and the aorta; studies in clinical radiology . Fig. 103 Fig. 104 Fig. 103. SAME CASE, IN EIGHT POSTERIOR OBLIQUE POSITIONNo exaggerated salience of the left auricle (OG). Fig. 104. SAME CASE, IN LEFT POSTERIOR OBLIQUE POSITIONExaggerated salience of the right auricle and ventricle. CONGENITAL AFFECTIONS 14-1 be explained only by the enlargement of the right inferiorarc of the heart, which had a direct relation to the dilata-tion of the right ventricle. Radioscopy allows, therefore,the opportunity to obtain, at the outset, the first signs ofcardiac failure which later developments Fig. 105. MLLE. C, PULMONARY STENOSIS WITH INTER-VEN-TRICULAR PERFORATION Dotted line shows the right contour of the heart after physical exertion. CHAPTER VI RADIOLOGICAL OUTLINE OF THE HEART IN CER-TAIN PATHOLOGICAL CONDITIONS NOTRESULTING FROM VALVULARLESIONS I. CARDIAC HYPERTROPHY AND DILATATION CARDIAC hypertrophy is not due exclusively to val-vular lesions. It may be due to other causes, themost frequent of which, according to many writers, isBrights disease. The question arises as to whether it isthe direct result of sclerosis of the kidney, as Potain be-lieves. This is probably not so and it is necessary ratherto agree with Traubes opinion that it results from thearterial hypertension which accompanies this evidence of this is that it appears in patients withhypertension before there is any renal lesion. It con-stitutes, therefore, a defensive reaction against circula-tory disturbances, whereas dilatation indicates that theresistance of the heart has begun to fail.
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