Studies in cardiac pathology . lifi. S?>.—Hicrsrin Aortic Valve. This hpocinioM also .shows marked left ventricular hypertrophy and abnoniKd fibrousbands traversing this chamber. (See p. 222.). Fic. 84.—Congenital Aortic Stenosis with Patency of the Ductus Arteriosus. Pathologic Notes: The aorta is very small, measuring at the arch only cm. in di-ameter, while the pulmonary artery is twice this size. The innominate, left vertebral, and sub-(•l:i\ian urlcrifs are normal in position and size. Immeiialdy at the junction of the lower edge ofIhi: li-fl .inhrliiiian artery and the aorta, the
Studies in cardiac pathology . lifi. S?>.—Hicrsrin Aortic Valve. This hpocinioM also .shows marked left ventricular hypertrophy and abnoniKd fibrousbands traversing this chamber. (See p. 222.). Fic. 84.—Congenital Aortic Stenosis with Patency of the Ductus Arteriosus. Pathologic Notes: The aorta is very small, measuring at the arch only cm. in di-ameter, while the pulmonary artery is twice this size. The innominate, left vertebral, and sub-(•l:i\ian urlcrifs are normal in position and size. Immeiialdy at the junction of the lower edge ofIhi: li-fl .inhrliiiian artery and the aorta, the latter vessel shows a sudden and marked constriction, external diameter of which measures 12 mm., while S cm,, above and below the constriction theaorta mcanureH 2 and cm. in diameter. On opening the aorta and looking down toward thefonstriction the ves-iel appears to end in a smooth, rounded, blind pouch, but on closer in-spection a fjinhoad-sissed opening can bo seen, through which a small probe can be the pulmonary artery just where it branches, and the aorta just at the proximalside of the constriction, is a narrow , about S mm. in length and .5 mm
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