Why is it called PR interval and not PQ interval?

Related questions

1. What is short PR?
2. What is the significance of this PQ interval?
3. What does PR interval indicate?
4. What does the PR segment mean?
5. What is the PQ interval on an ECG?
6. Is 1st degree AV block dangerous?
7. How long is the PR segment?
8. How is PR segment measured?
9. What is normal ST segment?
10. Can stress cause short PR interval?

Tags

1. #unless
2. #second
3. #absent
4. #actually
5. #period
6. #preferred
7. #electrocardiographers
8. #normal
9. #measured
10. #adults
11. #beginning
12. #interval
13. #complex
14. #because