A handbook of medical pathology : for the use of students in the Museum of St. Bartholomew's Hospital / by W.P. Herringham, A.E. Garrod, and W.J. Gow.

  • Herringham, Wilmot P. (Wilmot Parker), Sir, 1855-
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: A handbook of medical pathology : for the use of students in the Museum of St. Bartholomew's Hospital / by W.P. Herringham, A.E. Garrod, and W.J. Gow. Source: Wellcome Collection.

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    is complete, possessing a corpus Arantii. The curtains have under- gone a slight thickening. 3587.—A pulmonary valve with only two curtains. The three flaps of the tricuspid valve are not so distinct as usual, but otherwise the heart is normal. 3586a.—Exhibits a similar condition of the aortic valves; there is a nodule of indurated tissue near the end of one of the curtains. Abnormalities of Form. The semilunar valve curtains may be perforated by numerous apertures, and so have a fenestrated appearance. So long as this abnormality is confined to the parts which are in apposition when the orifice is closed (the lunulas) no regurgitation will result. Abnormalities of the Auriculo-Ventricular Valves. These are much less common, such deformities as are met with being usually such as might result from foetal endocarditis (which tends to attack the right heart rather than the left) rather than from errors of development. 3598.—Here there is well-marked affection of the tricuspid valve, which is reduced to a narrow membranous ring, and the chordae tendinese are almost completely wanting. Notice the hypertrophy of the wall of the right ventricle, and the diminution of its cavity. In addition to the above-mentioned abnormalities, the pulmonary artery is narrowed at the level of the valve-ring, the ductus arteri- osus was patent, and the aorta was enlarged to the level of origin of the patent ductus. Notwithstanding these deformities, the patient reached the age of 10 years. Imperfect Septa. In considering these deformities, bear in mind that in the early period of intra-uterine life the heart consists of a single auricle and a single ventricle, each of which subsequently is divided into two by the growth of a ventricular septum upwards from the apex, and of an auricular septum down- wards. In the same way the common arterial trunk
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