. A practical treatise on medical diagnosis for students and physicians . her rare affections of the muscles,as trichinosis, cyanosis is also observed. d. Obstruction of the Pulmonary Vessels. Interference Avith the circu-lation within the lungs, from pressure on the pulmonary artery or veinby aneurism or mediastinal tumor, or from disease of the heart itself, isa most frequent cause of cyanosis. In affections of the heart it is notseen until—in the case of valvular disease, for instance—compensationis lost and the right heart is dilated, causing an accumulation of blood inthe lungs. In the la
. A practical treatise on medical diagnosis for students and physicians . her rare affections of the muscles,as trichinosis, cyanosis is also observed. d. Obstruction of the Pulmonary Vessels. Interference Avith the circu-lation within the lungs, from pressure on the pulmonary artery or veinby aneurism or mediastinal tumor, or from disease of the heart itself, isa most frequent cause of cyanosis. In affections of the heart it is notseen until—in the case of valvular disease, for instance—compensationis lost and the right heart is dilated, causing an accumulation of blood inthe lungs. In the latter condition the bronchitis of passive congestionof the mucous membrane is an additional cause for the cyanosis. 2. Cardioimscular. Obstruction to the flow of venous blood anywherein the circulation will lead to the development of cyanosis. This is thecyanosis of jmssive congestion. Cyanosis due to causes mentioned aboveis always general. Cyanosis arising from the causes presently to bedetailed may be general or local, depending upon the seat of obstruction. <.
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