138 



CHARACTERS OF THE DICROTIC WAVE. 



The following points regarding the dicrotic wave have been ascer- 

 tained experimentally : 



xn 



XIII 



Fig. 58. 



I, II, III, Sphygrnogram of carotid artery ; IV, axillary ; V to IX, radial ; 

 X, dicrotic radial pulse ; XI, XII, crural ; XIII, posterior tibial ; XIV, 

 XV, pedal. In all the curves P, indicates apex ; R, dicrotic wave ; e, e, 

 elevations due to elasticity; K, elevation caused by closure of the semi-lunar 

 valves of the aorta. 



(1.) The dicrotic wave occurs later in the descending part of the 



