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Measurement
- 1 small box = 1mm = 0.04 sec = 40 miliseconds
- 5 small boxes = 1 big box = 5mm = 0.2 sec = 200 miliseconds
- Entire ECG strip is ~10 seconds
Primary Analysis
Segments & Intervals
Interval
|
Time (s)
|
Boxes
|
PR
|
0.12 - 0.20
|
3-5
|
QRS
|
.06 - 0.10
|
1.5-2.5
|
QTc
|
<0.44
|
N/A
|
Waves
Hypertrophy/Enlargement
Bundle and Fascicular Blocks
See Also
Source
- Adapted from Niemann, Lampe, Pani, Donaldson, ECGpedia.org
- Journal of Electrocardiology. Vol 43 (2010). 40-42.