| Measurements |
|---|
|
What is a normal PR interval?
0.10 to 0.20
|
|
What is a normal QRS interval?
< 0.10
|
|
What is the little box method?
R to R /1500
|
|
What is 6 seconds?
Three tick marks
|
|
What is a normal QT interval?
0.35 to 0.45
|