320 



DISEASES OF THE CIRCULATORY SYSTEM. 



number. Fibroid and fatty degenerative changes are usually 

 associated with dilatation. The size and weight of the organ 



A 



RA 



~LV 



RV 



Hypertrophy of right ventricle (front view). Heart is quadrilateral and septum is 

 displaced to the left. Right auricle is dilated. (From a case of chronic bron- 

 chitis and emphysema; specimen in Charing Cross Hospital Museum (Green).) 



LA 



FIG. 141. 



-RV 



LV- 



Anterior half of heart (Fig. 138), seen 

 from behind. Left ventricle forms 

 the whole of apex. Wall of LV : 

 wall of RV: : 10 : 2 (normal pro- 

 portion, 5 : 2) (Green). 



RA 



Anterior half of heart (Fig. 139), seen 

 from behind. Right ventricle is seen 

 to take greater share in formation of 

 apex than left ventricle does. Wall of 

 RV is much thickened, but not so 

 thick as that of the left. Tricuspid 

 orifice and RA are dilated (Green). 



