DISEASES OF THE CIRCULATORY 

 SYSTEM. 



The chief disorders of the circulatory system in cattle 

 are : 



Anaemic Palpitation is the result of an attenuated 

 and watery condition of the blood. The murmurs, espe- 

 cially the aortic, produced when the blood is in this 

 state, are softer and more regular than those which arise 

 from disease of the heart. They are often made to cease 

 by a judicious use of tonics. (Gresswell.) 



Rupture is rare and fatal. It is caused by overexer- 

 tion or violence. 



Blue Disease (cyanosis) is the result of imperfect 

 closure of the oval foramen (the aperture, in the fetus, 

 between the auricles of the heart), whereby the venous 

 blood from the right side of the heart mingles with the 

 arterial blood of the left side, giving rise to venous pulse 

 and ansemic palpitation, to a blue tinge of the skin and 

 mucous membranes, and to an emaciated and cold state 

 of the body. Moderate exercise may cause death. The 

 young animals usually either die or are killed. 



The heart is sometimes found outside the body in calves 

 and lambs. Death usually follows shortly after birth. 



Inflammation of the Pericardium (pericarditis) may 

 occur independently or in connection with rheumatism or 

 contagious pleuro-pneumonia. Careful treatment. Death 

 may occur in two days. 



