DISEASES OF THE HEART AND BLOOD VESSELS. 
241 
another attack. When the mare is unharnessed she can be 
made to travel a few miles at a walk and gentle trot. 
She was then showed to a veterinary surgeon of this city, who 
examined her, thought the trouble to be heart disease, and sent 
her to me. 
Clinical Examination .—At rest the patient seems in excel¬ 
lent health ; the condition is good, appetite good, she lies down 
every night, she is playful in her box. The pulse, felt at the 
jaw, is 44 and weak, but weaker at the left than at the right; 
there is no perceptible difference in the strength of the pulse 
felt at the temporal arteries. Rectal temperature normal; Respi¬ 
ration slightly abdominal, about i8 per minute. The beatings 
of the heart are strong and audible on a larger surface than in 
healthy animals (hypertrophy). The first sound is metallic and 
double, but no bellowing sound (bruit de souffie) or any other 
abnormal sound can be heard. The respiratory murmur is 
hardly distinct at rest. At the inferior part of the chest there is 
a gurgling sound (bruit de liquide) ; there is also some d-y creo- 
itating rales. There is a strong, sonorous, moist cougli, as 
chronic bronchitis. Slight venous pulse at jugular vein. T^.e 
result of the clinical examination of the patient at rest is that 
there is hypertrophy of the heart, bronchitis, some emphysema 
of the lungs, and want of concordance in the contraction of the 
two ventricles of the heart; the venous pulse indicates that 
there may be (or not) an abnormal plenitude of right heart, but 
I could find nothing indicating a valvular disease. 
After 36 hours’ rest in the stable the mare was yoked to an 
empty sleigh, weighing about 150 pounds, special attention being 
paid that the collar was large enough. She starts at a walk and 
seems all right ; she is then made to trot gently; she went 
about 300 feet, when the dyspnoea is most intense ; she stag¬ 
gers, falls on the ground, has a few convulsions, then becomes 
quiet and unconscious. She is allowed to rest a few minutes, 
the respiration gets gradually normal or nearly so, she gets up 
and she is returned at a walk to the stable. Auscultation reveals 
the belchings of the heart to be weak ; in fact, almost impercep- 
