108 PULSE RECORDS IN THEIR RELATION TO 



the chest was open. In this connection it must be remembered 

 that although lower pressures have been recorded in the ventricle 

 with the chest wall uninjured, yet pressures as low as 28 and 

 38 mm. Hg have been found in dogs by Goltz and Gaule, de Jager 

 and others, 1 with the thorax open. 



The jugular and cesophageal curves in man often show the third 

 negative wave or " y " depression to be of considerable extent, 

 and a relief of stasis is certainly insufficient to account for it. 



FIG. 3. 



The evidence of the jugular pulse in this respect is occasionally 

 such as to indicate that the inflow from the veins is as great 

 during ventricular diastole as during ventricular systole. It is 

 probable that the larger the ventricle the greater is its power as 

 a suction pump. 



APPENDED NOTE 



In sending off the proofs, the author is able to include a simul- 

 taneous jugular curve and electrocardiogram (Fig. 3). The figure 

 shows : time in - sec. ; the jugular curve, taken photographically 



1 Full references to these observations will be found in Porter's article. 



