210 



Canadian Record of Science. 



wave, 1, a first and second diastolic wave, 2 and 3, Such 

 a typical and complete form, however, cannot always be 

 observed, but one or more of the above mentioned waves 

 is often absent from the tracing. 



The Eate of Pbopagatiox through the Jugular Vein. 



The results of the measurements made in the different 

 experiments were arranged in tabular form, as given 

 below, and also the rate of propagation and the pressure 

 in the jugular, estimated by the methods described above. 

 The results are set down in order according to the velocity. 



Table I. 



Rate of Propagation of the Presystolic Wave. 



(All measurements in centimeters. ) 



'3 * 



a > 



c S 3 fl 



23-5-12-5=U- 



? £ > 



i p a 2 



a 

 ■065 

 •060 

 •070 

 •080 

 •100 



>.^ 

 rt tc ;; 



i.S 5 



o ■; [" 

 ^ 5 S 



« £ =■ 



s 

 1^8o 

 1-70 

 1-80 

 1-75 

 1-83 



313 

 312 

 283 

 241 

 201 



c b rf 



" s ^ 



53 tx m 



0) -a • 



£ c < 

 p 



bo 

 5-4 

 32 

 3.5 



4-6 



Average 270 



In the remaining tables'only the calculated results will 

 be given, namely, the rate of propagation in centimeters 

 per second and the pressure in centimeters of water in 

 the central end of the jugular vein. 



Table II. 







Table III 







Presystolic Wave. 



P 



resystolic Wave during Dyspncea 



V 



P 





V 



P 



228 



8^5 





257 



8 



9 



2-25 



9-5 





254 





9 



1 



218 



8-8 





235 





9 



3 



194 



8^5 





235 





9 



4 



173 



8^5 





231 





9 



2 



170 



9-0 





221 





8 



5 









208 





9 



3 



Average 201 



8^8 





205 . . 





9^2 







A\ 



erage 220 





9 



1 



