ECG Basics: Difference between revisions
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== General == | == General == | ||
*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 | ||
*Entire ECG strip is ~10 seconds | *Entire ECG strip is ~10 seconds | ||
==Rhythms== | |||
*[[Arrhythmias]] | |||
== Intervals == | == Intervals == | ||
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Revision as of 06:10, 5 February 2014
General
- 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
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 |
Segments
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.