Circulation:

If central pulses (femoral  in infants and  carotid in  children) are not  palpable, begin chest compression without losing any time.  In  young infants, encircle  the chest with  both hands forming a  rigid  surface in  the back and place  the  thumbs at  the  level of  mid  sternum to compress the chest.  In  toddlers, heel of  one hand and  in older children heel of  both hands (one above the other) can be placed on  the mid sternum  for compression. Elbows are then straightened with shoulders directly over the hands so that thrust  is directly down.  In  childern over 8 years you may  use "adult"  two hand method of chest compression. The depth  of  compression should  be 1/2 to 1"  in  inhnts,  1  to  1.5" in  younger and 1.5 to 2"  in older  children . 

Synchronizing Chest Compression and Breathing: The  rate of  compression should  be about 100 in  infants  and  80  in  older children. After every 5 compressions one breath should  be delivered  during  recovery  phase of  fifth compression. Every  few minutas  the CPR  can  be  stopped to  see  if spontaneous pulse has  returned.