. The heart and the aorta; studies in clinical radiology . Fig. 18. ANATOMICAL CKOSS-SECTION IN LEFT POSTEEIOEOBLIQUE POSITION 44 THE HEART AND THE AORTA posterior thoracic region; at the oesophageal zone level,it is tangent to the posterior wall of the two auricles,especially the right auricle. The left auricle and the leftventricle are nearest the observer and the major axis ofthe heart nearly parallel to the plane of the screen (). The apex of the heart on the left ought then to beseen and a projection obtained extending to the externalwall. This is exactly what is shown on the orthod
. The heart and the aorta; studies in clinical radiology . Fig. 18. ANATOMICAL CKOSS-SECTION IN LEFT POSTEEIOEOBLIQUE POSITION 44 THE HEART AND THE AORTA posterior thoracic region; at the oesophageal zone level,it is tangent to the posterior wall of the two auricles,especially the right auricle. The left auricle and the leftventricle are nearest the observer and the major axis ofthe heart nearly parallel to the plane of the screen (). The apex of the heart on the left ought then to beseen and a projection obtained extending to the externalwall. This is exactly what is shown on the orthodiagram(Fig. 19). On the other hand, in this latter figure, it isseen that the contour of the heart outlines in the clearspace the auricles, notably the right, and toward thediaphragm the lower part of the left ventricle. At theright of the figure the tracing outlines the auricles above,. Fig. 19. ORTHODIAGRAM TAKEN IN THE LEFT POSTERIOROBLIQUE POSITION AT 50 DEGREES OD, right auricle; OG, left auricle; VG, left ventricle; p, apex of theheart. the left ventricle below; during radioscopic examination,the pulsations of the apex at p are clearly seen. Right anterior oblique position. This position is in away the inverse of the preceding. The normal ray entersat the left posterior thoracic wall and comes out through SHADOW OF HEART IN NORMAL STATE 45 the right antero-lateral thoracic region (Fig. 20); the right auricle and the right ventricle are nearer theobserver.
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Keywords: ., bookcentury1900, bookdecade1920, bookidheartaortast, bookyear1920
