Why is it called PR interval?

Related questions

1. What is a normal PR?
2. What is a normal ST segment?
3. What is PR on ECG?
4. What does Q represent on ECG?
5. What does a prolonged PR interval indicate?
6. What is sinus tachycardia with short PR?
7. What is a normal PR interval?
8. What causes PR segment?
9. What is normal PR interval in ECG?
10. What is PR depression?

Tags

1. #syndrome
2. #conduction
3. #degree
4. #bypassed
5. #parkinson
6. #short
7. #ventricles
8. #prolonged
9. #levine
10. #called
11. #sinoatrial
12. #delay
13. #block
14. #delayed
15. #wolff
16. #interval
17. #ganong
18. #indicates
19. #first
20. #impulse
21. #white
22. #nodal