Heart Diseases, 155 



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aruce, and there is a want of correspondence between the beat 

 of the heart and the stroke of the pulse. 



Treatment. — It is doubtful if any treatment will arrest 

 the disease. Prof. Williams recommends for trial, chlorate 

 of potash, say one ounce, twice daily, with attention to the 

 general health. 



AITEURISM— Eia.ARGEMENT OF THE ARTERIES. 



Definition. — A dilatation or expansion of a part of ap 

 artery, with thinning and weakening of its coats, and tend- 

 ing to burst into the surrounding tissue, thus forming a pul ■ 

 sating tumor containing blood. 



Causes. — Generally aneurisms arise either from injuries, a3 

 a blow, a strain, a kick, a stab, or else from some change 

 taking place in the coats of the artery, weakening it, as for 

 example, fatty degeneration. This is most common in old 

 horses who show signs of heart disease. Certain worms in 

 the arteries (the so-called Sderostoma) may also produce them 

 in the horse. 



Symptoms. — There is a visible tumor, which is soft and 

 fluctuating to the feel, and which by steady pressure can be 

 made to disappear or partly so, but reappears as soon as the 

 pressure is removed. It is also felt to have a regular pulsa- 

 tion, like the beat of the heart. 



Treatment. — This is not very successful. If the tumor is 

 where it can be readily reached, steady pressure upon it by a 

 pad and firm bandage for several days, may be successful in 

 causing its disappearance. Some surgeons cut down upon it, 

 tie the artery above and below, and then open the sack and 

 turn out its contents. 



The complaint constitutes an unsoundness, as it is generally 

 a permanent injury to an animal. 



