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== | == Measurement == | ||
*1 small box = 1mm = 0.04 sec = 40 miliseconds | *1 small box = 1mm = 0.04 sec = 40 miliseconds | ||
*5 small boxes = 1 big box = 5mm = 0.2 sec = 200 miliseconds | *5 small boxes = 1 big box = 5mm = 0.2 sec = 200 miliseconds | ||
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*[[Arrhythmias]] | *[[Arrhythmias]] | ||
== Intervals == | == Segments & Intervals == | ||
*[[ST Elevation]] | |||
*[[ST Depression]] | |||
*[[QT Prolongation]] | |||
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| N/A | | N/A | ||
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==Axis== | ==Axis== | ||
Revision as of 06:16, 5 February 2014
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
Rhythms
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 |
Axis
- Cannot be measured if BBBs are present
- If up in leads 1 and AVF then normal axis
Waves
Hypertrophy/Enlargement
Blocks
Low ECG Voltage
See Also
Source
- Adapted from Niemann, Lampe, Pani, Donaldson, ECGpedia.org
- Journal of Electrocardiology. Vol 43 (2010). 40-42.