This was my first course but I understand some of the thinking has changed. They no longer require that you check for a pulse but simply look for signs of response and open an airway and check for breathing. First thing for an adult is to dial 911 if alone or send someone if available. If there are no signs of breathing you give two rescue breaths and then begin CPR at a ratio of 15 compressions to 2 breaths. For a you perform 1 min of CPR before calling 911 if alone. The ratio is 5-1.