Final answer:
Signs of impending cardiac arrest in a pediatric patient include rapid breathing, increased heart rate, pale or bluish skin color, and loss of consciousness.
Step-by-step explanation:
The signs of impending cardiac arrest in a pediatric patient can include a variety of symptoms. Some of these symptoms are rapid breathing and increased heart rate, which can be an immediate response to the heart struggling to pump blood efficiently. Another sign is a pale or bluish skin color, known as cyanosis, which occurs due to lack of oxygen in the blood. Additionally, loss of consciousness is a severe sign that the brain is not receiving enough oxygenated blood. Therefore, the correct answer to the question is 4) All of the above.