CONGENITAL HEART DISEASE. 



... 



superior vena cava. 



Fossa ovalis. 



Inferior vena cava. 



Orifice of coronary 

 sinus. 



Right auriculai 

 appendix. 



Right ventricular 

 cavity. 



Defect in fore 

 part of the 

 auricular 

 septum. 



FIG. 32. Heart of adult with large defect in the auricular septum. 



Fossa ovalis intact. (St. Thomas's Hospital Museum.) 



Semi-diagrammatic. 



Aorta. 



Infundibulum of 

 right ventricle. 



Cut surface of the 

 supra-ventricular 

 crest which inter- 

 venes between the 

 tricuspid orifice and 

 the pulmonary 

 orifice. 



Pulmonary artery. 



Pulmonary valve. 



Left posterior aortic 

 --""" cusp. 



Right posterior aortic 

 cusp. 



Defect in upper part 

 of ventricular septum. 



Wall of left ventricle. 



Section of wall of 

 right ventricle. 



Tricuspid orifice. 



FIG. 33. The heart of an adult in which the highest part of the 

 interventricular septum is wanting. The aortic valves are seen 

 through the septal opening, and the aorta communicates freely 

 with both ventricles. (St. Thomas's Hospital Museum.) 

 Semi-diagrammatic. 



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