ECG (main)
Revision as of 06:13, 5 February 2014 by Rossdonaldson1 (talk | contribs)
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
- ACS - ECG
- ECGs by Diagnosis
- ST Segment Elevation
- ST Segment Depression
- Arrhythmias (DDX)
- QT Prolongation
Source
- Adapted from Niemann, Lampe, Pani, Donaldson, ECGpedia.org
- Journal of Electrocardiology. Vol 43 (2010). 40-42.