. Diseases of the heart and thoracic aorta. are studded with projecting gra-nulations and vegetations, in many cases, in fact, the ulcers arehidden beneath the fungating growths which surround them. When an ulcer involves a valve flap, the resisting powerof the membrane is of course destroyed, and under the forceof the blood-pressure an acute aneurism or bulging of thevalve is not unfrequently produced. The valvular aneurismsvary in size, but are seldom larger than a marble. Whenthe anterior segment of the mitral valve is affected, the aneur-ismal sac bulges into the auricle, the orifice of th
. Diseases of the heart and thoracic aorta. are studded with projecting gra-nulations and vegetations, in many cases, in fact, the ulcers arehidden beneath the fungating growths which surround them. When an ulcer involves a valve flap, the resisting powerof the membrane is of course destroyed, and under the forceof the blood-pressure an acute aneurism or bulging of thevalve is not unfrequently produced. The valvular aneurismsvary in size, but are seldom larger than a marble. Whenthe anterior segment of the mitral valve is affected, the aneur-ismal sac bulges into the auricle, the orifice of the sac beingsituated on the ventricular surface of the valve, the surfaceon which the blood presses during the contraction of the leftventricle. (See figs. 169, 170, 171, 172.) Aneurisms of theaortic segments bulge into the cavity of the ventricle, theorifice of the sac being situated on the upper or arterial surfaceof the segment; and here again the direction which the sactakes is determined by the blood pressure. The aneurismal ^r^^-.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectheart, bookyear1884
