clink \\. \i-i 







I ti ;t simple <-ns<- 1 ; 



but w hen the P-R i 



gthened bej ond 1 1" 

 92 



l'\l;l ! \i I I In* 









ventric • jpond to the impuJ 

 time, hut occasionally tail to do bo, whi 

 beat." Tl 



complex, >li«'\\ ing thai the aui 

 luit that the ventriclea failed to i 

 the sinoauricular node l 



: i 1 



the auricles beat ii d 

 (»f the • 

 Q R 9 T I 

 made ont w hen the 





