Manual of pathological anatomy . s point, observes that atrophy may be defined as asimple shortening of the valve, and, in the first instance, a mereatrophy in the direction of the length. He speaks of the cribriformappearance in the flaps as also resulting from the same process,and has found the two conditions chiefly in the mitral and tricuspidvalves. In this he differs from other authors. Eokitansky, forinstance, has only met with the lesion in the arterial valves. , out of about thirty cases of valvular disease, found thelesion to be atrophy in ten. The mitral valve was shortene
Manual of pathological anatomy . s point, observes that atrophy may be defined as asimple shortening of the valve, and, in the first instance, a mereatrophy in the direction of the length. He speaks of the cribriformappearance in the flaps as also resulting from the same process,and has found the two conditions chiefly in the mitral and tricuspidvalves. In this he differs from other authors. Eokitansky, forinstance, has only met with the lesion in the arterial valves. , out of about thirty cases of valvular disease, found thelesion to be atrophy in ten. The mitral valve was shortened infive, the tricuspid in five; both in two. In one the mitral valvewas cribriform, in two the tricuspid, and in one both the aortic andpulmonary valves were so. Rupture of the Valves.—It is doubtful whether perfectly healthyvalves can be ruptured by violent or excessive tension, but therecan be no doubt that this accident often occurs in valves weakenedby disease.! The causes are usually great muscular exertion, and Fig. Atheromatous deposit in the valves of the aorta of a man aged twenty-six, withrupture at the point marked by *; there was also cong-enital union at the pointmarked by t of two of the valves. The case is described in the Reports of the Pathological Society, vol. iv. p. 100. vomiting or sudden mental shock. Eigidity or brittleness arisingfrom calcareous deposit is the most frequent predisposing cause;but it is said that a soft gelatinous condition may lead to lacera-tions, especially of the valves of the aorta. The fissured appearanceof the true rents thus produced distinguishes them from the per-forations resulting from, atrophy. Calcareous and ossific deposits, which we have seen to be notuncommon on the surface of the heart, are very rarely met withunder the endocardium, except in connection with the present the most varied forms, which may be compared tothe fantastic shapes assumed by molten lead when poured into * * Medico-Chirurgical Tr
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