As an expert in emergency medical services, I can provide you with the current guidelines for CPR. According to the American Heart Association, the recommended ratio for CPR is 30 chest compressions followed by 2 rescue breaths, which constitutes one cycle. This should be repeated continuously. The guideline does not specify a certain number of cycles to be performed in 2 minutes; rather, it focuses on maintaining high-quality CPR with minimal interruptions. However, if we consider the context provided, it seems that five cycles of CPR might be a reference point for some practitioners, which would equate to 150 chest compressions (30 compressions per cycle) and 10 rescue breaths over the course of 2 minutes. read more >>

Chest compressions delivered in the presumed 2-min CPR were 123+/-12 and 149+/-2 in the five cycles CPR (P<0.05). Sixty-two participants (77.5%) found it easier to count five cycles of CPR. The time needed to deliver the first two rescue breaths was between 12 and 15 s.read more >>