Symptoms to check first
There is no response when called.
The person cannot speak normally. The person cannot speak.
Color of the face, lips, and ears is poor. The person has cold sweats. 
The person feels cold.
The person is submerged in water. The person is sinking.
The person is not breathing. The person has no breath.
There is no pulse. The heart has stopped.
None of the above are applicable.