BRADYCARDIA IN THE HORSE AND DOG. 
725 
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o 
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BRADYCARDIA IN THE HORSE AND DOG, 
By S. J. J. Harger, Y.M-D., Professor of Anatomy and Zootechnics, Veteri¬ 
nary Department University of Pennsylvania. 
Bradycardia, as the name indicates, consists in a weakness 
of the heart’s action, with a reduction of the frequency of its 
beats. This symptom sometimes accompanies the advanced 
stages of diseases of the brain,.as encephalitis and immobility, 
from pressure on and consecutive disturbance of the centres 
in the floor of the fourth ventricle. In severe cases of icterus 
the toxic effects of the bile, like those of digitalis, produce 
the same result. Outside of these causes there aie certain 
diseases, astiologically often quite obscure, in which the bra¬ 
dycardia is so seldom seen that one could be tempted to 
treat it as an idiopathic condition. 
Professor Frohner (Monatshefte fur praktische Thierheil- 
kunde) describes such a case of a nine-year-old bitch, with a 
