384 



Dr. S. W. Patterson. The Antagonistic 



blood to about 1 in 3,500,000, the mean heart volume diminished 17"5 c.c. 

 This takes place by the diastolic volume decreasing owing to lessened time 

 between each beat for filling with the increased rate of the heart ; and as the 

 diastolic volume diminishes more rapidly than the systolic (fig. 4) the output 



Fig. 4. — Effect of Adrenalin on Heart Volume, Blood Pressure, and Venous Pressure. 

 0"1 mgrm. adrenalin added at the arrow. Read from left to right. Systole down- 

 wards ; decrease of cardiac volume caused fall of lever. 



per beat is less. With recovery from adrenalin, the mean heart volume is 

 greater than before its administration. A heart working badly and not 

 dealing well with its venous inflow, so that the venous pressure is high, or a 



