Applications of Electronics in Medicine 



45 



FIG. 5. Electrocardiogram, lead II. Electrical jugular pulse tracing. The 

 traverse of the pair of spots was photographed as they appeared for visual observation 

 - — opening the shutter at the beginning and closing it at the end of the traverse of 

 the spots. Illustrative tracing taken with the author's phonoelect;ocardioscope. 



servation — opening the camera shutter at the beginning, and 

 closing it at the end of the traverse of the spots. Figure 6 is 

 similar to Figure 5, but shows electrocardiogram, lead II, and 

 a stethoscopic phonocardiogram, taken over the mitral area of 

 a case of rheumatic endocarditis. 



FIG. 6. Electrocardiogram, lead II. Apical phonocardiogram of a case of rheu- 

 matic mitral endocarditis. The traverse of the pair of spots was photographed as 

 they appeared for visual observation — opening the shutter at the beginning and 

 closing it at the end of the traverse of the spots. Illustrative tracing taken with 

 the author's phonoelectrocardioscope. 



