What is the QRS wave on an ECG?

Related questions

1. What heart rhythm has no P wave?
2. What does ischemia look like on an ECG?
3. Why is the T wave in an ECG positive?
4. Why ECG test is done?
5. What causes ECG changes?
6. Where are ECG leads placed?
7. What does a high T wave mean on an ECG?
8. Can an inverted T wave be normal?
9. What does the ECG do?
10. What do the P QRS and T waves represent?

Tags

1. #obvious
2. #electrocardiogram
3. #combination
4. #deflections
5. #tracing
6. #visually
7. #spike
8. #complex
9. #other
10. #graphical
11. #central
12. #words
13. #three
14. #usually
15. #typical