. Medical diagnosis for the student and practitioner. ecant:a stubby broken neck. A point of differential diagnosis between this configuration and that of chronicgeneral cardiac ins 1 with wide dilatation is that the latter inclines to the triangular in outline. In such cases a slight, low-lying, small pericardialaccumulation may intensify the triangular configuration and in both thepulsatory excursion of the borders is greatly diminished. blood supply is irregular, unresponsive or inadequate. Jurgensen also made the interestingobservation that in pressure cases arterial tension was markedly i
. Medical diagnosis for the student and practitioner. ecant:a stubby broken neck. A point of differential diagnosis between this configuration and that of chronicgeneral cardiac ins 1 with wide dilatation is that the latter inclines to the triangular in outline. In such cases a slight, low-lying, small pericardialaccumulation may intensify the triangular configuration and in both thepulsatory excursion of the borders is greatly diminished. blood supply is irregular, unresponsive or inadequate. Jurgensen also made the interestingobservation that in pressure cases arterial tension was markedly increased unless the pres-sure of the gastric gas content was relieved. (C. Aortic .-. 1: .1: :-?-. 582 MEDICAL DIAGNOSIS Sagit talillumination. A reference to the rationale of exudative pericarditis, fully set forthunder its proper heading, will make evident the difficulty or impossibility ofroentgenograph^ detection in the case of many small pericardial exudates. All degrees of variation of the typical picture here depicted may Fig. 294.—Large aneurysm of the ascending aorta. (Dr. Frank S. Bissell.) The Normal Aorta.—In the frontal (sagittal) position examination ofthe left side shows a shadow of semi circular contour above, which representsthe projection of the upper descending portion of the aortic arch. Meas-urements are made to determine the total width of the arch at this point,and the distance which separates its point of origin from the sterno-clavicular HEART ROENTGENOGRAPHY 583 articulation. In normal adults of middle age this distance is on the averagetwo or three centimeters. Its length diminishes in the old and tends toshortness in patients with a short thorax. However the upper margin ofthe aortic semicircle never overlaps the shadow of the left clavicle exceptin the presence of aneurysm of the arch. The above observations are madein the erect position and during shallow respiration.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdiagnos, bookyear1922
