The success of Seattle and King County can be attributed to the following elements of high-performance CPR:
- Correct hand position
 - Compression rate of 100-120 beats per minute
 - Depth of compression of 2-2.4 inches (updated to meet American Heart Association 2015 guidelines)
 - Full recoil on the upstroke
 - 50:50 duty cycles
 - Ventilations of one second each
 - Minimal interruptions of CPR (no pause to exceed 10 seconds)
 - Intubation and IV start without pausing chest compressions
 - Hovering over chest during defibrillation.5
 
Each of these elements have been implemented system-wide and reinforced throughout the years.