What is cyanosis a sign of?

Related questions

1. What is the survival rate of hypoplastic left heart syndrome?
2. Why do I have dark purple lips?
3. What does Acyanotic mean?
4. What does left to right shunting mean?
5. How long does it take to become cyanotic?
6. Why is my skin purple and blotchy?
7. What causes cyanosis?
8. Which of these is a cyanotic heart disease?
9. What is a cyanotic defect?
10. Why do old people's skin turn purple?

Tags

1. #fingernails
2. #bluish
3. #example
4. #cyanosis
5. #insufficient
6. #color
7. #level
8. #blood
9. #oxygen
10. #medical
11. #mucous
12. #membranes