Anatomical Chans'es. 



1065 



cavity either remains of normal thickness, or appears to be 

 even thicker (Dilatatio activa). In this case the presence of 



Fig. 186. Cardiac Dilatation. The dotted line gives the normal heart dullness, 



the solid line indicates the enlarged heart dullness (4th to 6th intercostal space), 



the dullness passes backward into the anterior border of the liver dullness, Avhich is 



also enlarged. (Same dog as in Fig. 187.) 



Fig, 187. Cardiac Dilatation. Enormously increased cardiac dullness on the right 



side. The dotted line gives the borders of the dullness, which occurs normally in 



large dogs. (The same dog as in Fig. 186.) 



