ECG Interval Assessment Tool

NOTE: A handy duplicate of Figure 6–6 can be found inside the front cover of this book.

To use the tool, place "0.00" at the appropriate point in the cycle and follow the line (downward) that falls at the end of the interval being measured. (Measures are in hundredths of a second.) Refer to dysrhythmia tables for more information.

Norms:

• P–R interval = 0.12—0.20
• QRS = 0.06—0.10
• Q—T = 0.32 —0.4