Diseases of the Organs of Circulation, 201 



treme irritability of the heart. Avoid bleeding and blisters, 

 and use embrocation No. 1 when the acute signs are 

 allayed. Subcutaneous Injections, No. 5. 



Embolism and Disease of the Valves of the Heart are 

 common results. The first are fibrinous deposits from 

 the blood, which may remain and accumulate in the 

 heart, or, passing with the circulation, enter a blood- 

 vessel and obstruct the passage. Sudden death after a 

 time will result in the first instance, and evidences of the 

 latter are often to be seen in local wasting and paralysis. 

 When the valves are diseased, the animal is weak and 

 faint, and is liable to local swellings, difficult breathing, 

 and sudden death. 



Aneurism, or enlargement of an artery at a given point, 

 is another serious consequence of heart-disease, especially 

 when it affects an important internal vessel. 



Phlebitis, or Inflammation of a Vein, is commonly 

 seen as a result of bleeding. The swelling should be un- 

 ceasingly fomented for hours, a strong dose of sedative 

 medicine being first given. Some prefer aloes, to be fol- 

 lowed by a powerful blister along the course of the vein, 

 the head being tied up to prevent the animal gnawing or 

 rubbing the part. 



Megrims, or Venous Obstruction, is caused by pressure 

 upon the jugular vein from badly-fitting collars, prevent- 

 ing the return of blood from the head. The result is, a 

 species of frenzy is caused, and, after some excitement, 

 shaking the head, &c, the animal darts forward, generally 

 falling headforemost. The collar should be pushed for- 

 ward, and pressure avoided, on the first manifestation of 

 excitement, or the occupants of the vehicle may come to 

 serious grief. Dash cold water over the head, and take 

 the animal home as soon as possible. He should not be 

 driven unless the collar can be worn comfortably and 

 safely, but his utility as a saddle-horse may be satisfactory. 



Lymphangitis.— This is the "Weed," "Thick-leg," 

 "Shot of Grease," "Dropsy," and emphatically "Mon- 

 day morning " and " Holiday " disease. Errors of diet, 

 with idleness after heavy work, are the causes which, in a 

 few hours, cause considerable disturbance of the system, 



