. The heart and the aorta; studies in clinical radiology . l transverse diameter being of 4 or 5 cm., the normal figure. However, in theright anterior oblique position the enlargement wasbarely appreciable, for the diameter of the aorta meas-ured only cm., which is but a slight deviation from thephysiological. On the screen, the arch of the aorta wasgreatly dilated at each systolic pulsation and in the courseof full pulsations its walls deviated 5 or 6 mm. from theirnormal position of rest. The necessaiy conclusion, then,was that the increase in volume of the aorta was due t
. The heart and the aorta; studies in clinical radiology . l transverse diameter being of 4 or 5 cm., the normal figure. However, in theright anterior oblique position the enlargement wasbarely appreciable, for the diameter of the aorta meas-ured only cm., which is but a slight deviation from thephysiological. On the screen, the arch of the aorta wasgreatly dilated at each systolic pulsation and in the courseof full pulsations its walls deviated 5 or 6 mm. from theirnormal position of rest. The necessaiy conclusion, then,was that the increase in volume of the aorta was due to afunctional dilatation rather than to a permanent dilata-tion, that the arterial walls had retained all their elastic-ity, which led to a revision of the dubious prognosis re-sulting from the first examination. In this connection,insistence should be made on the value of fluoroscopicexamination, as conclusive information is thus a radiographic tracing only had been taken, there is nodoubt that it would have been found like Fig. 78, and that. Fig. 79. AOETIC STENOSIS WITH AORTITIS. MAN 56 YEAES OF AGE 114 THE HEART AND THE AORTA a serious lesion of the aorta would have been suspectedwhich, in point of fact, did not exist. On the other hand, when aortic stenosis is accompaniedby aortitis affecting the thoracic aorta in its visible por-tion, a tracing is obtained analogous to that of Fig. 79,which leaves no room for doubt. This figure is of a manfifty-six years of age with aortic stenosis. The tracingshows hypertrophy of the two ventricles, especially of the
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