478 



DISEASES OF THE CIRCULATORY SYSTEM, 



upon the smaller- sized arteries we perceive peculiar vibrations, the 

 crural artery giving the double sound of Traube. 



Characteristic symptoms of aortic insufficiency : Diastolic blowing; 

 dilatation and hypertrophy of the left heart, strong arterial pulse 

 {pulsus celer y Corrigan's pulse)/ arterial bruits. 



Polansky has observed an interesting case of aortic insufficiency 

 in the horse. He has noted an increase of the precordial dulness, 

 violent beatings, a strong diastolic murmur, of metallic resonance, 

 which was also heard in the neighborhood of the dorsal region and 

 upon both carotids, but which became weaker and weaker in pro- 

 portion to their remoteness from the heart. The pulse, which was 

 broad and full, lifted the finger and was visible in several peripheral 

 arteries, especially in the transversal artery of the face, in the pos- 

 terior auricular, and anterior and posterior tibials. After a con- 

 tinued moderate exercise for a quarter of an hour, there was per- 

 ceived in the region of the heart a kind of very distinct diastolic 

 shock, which disappeared as soon as the action of the heart and the 

 respiration had again become calm. 



YI. Contraction of the aortic orifice. It communicates 

 a whirling movement to the blood-flow, which is accompanied by 

 a systolic bruit (blowing). The pulse is very small and slow, the 

 left ventricle becomes hypertrophied; when the contraction is much 

 marked we observe symptoms of cerebral anemia, vertigo, etc. 



Characteristic symptoms of aortic contraction : Systolic blowing, 

 a very small pulse, hypertrophy of the left heart. 



Bagge has observed two horses in which the first heart-sound 

 was accompanied by a dull humming sound ; the hand applied 

 upon the precordial region perceived a shuddering sensation ; the 

 pulse was weak. One of these horses was very soft in working ; 

 he ate little and had become considerably emaciated. Lustig has 

 described a case of aortic insufficiency and contraction in the horse. 



VII. Insufficiency of the valves of the pulmonary 

 orifice. It is very rare, and is indicated by a diastolic bruit 

 (blowing) and accompanied by hypertrophy and dilatation of the 

 right ventricle, and marked respiratory and circulatory troubles as 

 soon as the activity of the heart begins to abate. 



1 Aortic insufficiency is the only organic lesion of the heart where the pulse is 

 strong. The blood-spurt which is thrown by the ventricular systole into the arterial 

 apparatus, where the tension is we^k, lifts the vascular wall abruptly, a.nd produces 

 Û full pulsation, which is sometimes rebounding in the horse. — n. d. t. 



