. Medical diagnosis for the student and practitioner. cava are usually overridden by that of the spinal column and ster-num. Below, the border of the right auricle appears as a rather sharp con-vexity. The right ventricle is not determinable marginally, for it is theright auricle which forms the right border of the cardiac silhouette, save in thecase of udrop heart in which the right ventricle forms it. Either the aorta orvena cava may be visible above without pathological significance; the formeras a convex shadow, the latter as a straight perpendicular line. With thisdescription of the norma
. Medical diagnosis for the student and practitioner. cava are usually overridden by that of the spinal column and ster-num. Below, the border of the right auricle appears as a rather sharp con-vexity. The right ventricle is not determinable marginally, for it is theright auricle which forms the right border of the cardiac silhouette, save in thecase of udrop heart in which the right ventricle forms it. Either the aorta orvena cava may be visible above without pathological significance; the formeras a convex shadow, the latter as a straight perpendicular line. With thisdescription of the normal heart outline one may proceed logically to a con-sideration of valvular disease. ? Valvular Disease.—In our present state of knowledge it is more scientificperhaps to speak of a mitral, or aortic heart configuration than to attempt a hear: ROENTGENOGRAPHY 575 more accurate roentgen differentiation of various types. However, eachlesion tends to modify the cardiac outline and the orthodiagraphic measure-ments in a somewhat characteristic Fig. 289.—Advanced endocarditic mitral insufficiency. Note prominence of bothconvexities and elliptic, contour of left ventricle. Lung shadow opposite left ventricle !probably due to past embolic process. {Dr. Frank S. Bissell.) Mitral Insufficiency.—If the mitral valve becomes freely incompetent atendency to stasis and overload in the left auricle is at once evident. Boththe pulmonary artery and the auricle thus become overdistended and aresultant alteration may be noted in the contour of the left cardiac border. The section intermediate between the aortic convexity above and that of j change in leftthe left ventricle below becomes rounded out so greatly as to equal or even to 576 MEDICAL DIAGNOSIS exceed the former in prominence, the result being an obliteration of thenormal concavity and the formation of a relatively or absolutely straightline from the aortic convexity above, obliquely downward to the the left ventricl
Size: 1444px × 1731px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectdiagnos, bookyear1922
