ECG axis: Difference between revisions
Neil.m.young (talk | contribs) (Text replacement - "* " to "*") |
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*Causes: | *Causes: | ||
**Right ventricular hypertrophy | **Right ventricular hypertrophy | ||
**Pulmonary | **Pulmonary hypertension - Acute (PE) & chronic lung disease (COPD) | ||
**Left posterior fascicular block | **Left posterior fascicular block | ||
**Lateral MI (from Q-waves in lead I) | **Lateral MI (from Q-waves in lead I) | ||
Revision as of 12:31, 31 July 2016
Normal Axis
- -30°→90°
- Dominant QRS direction (positive or negative) can be used to approximate axis
- Normal axis if positive QRS in leads I and aVF
Right Axis Deviation
- Causes:
- Right ventricular hypertrophy
- Pulmonary hypertension - Acute (PE) & chronic lung disease (COPD)
- Left posterior fascicular block
- Lateral MI (from Q-waves in lead I)
- Ventricular ectopy (VT)
- Hyperkalemia
- Lead misplacement
- Dextrocardia
- Normal thin adults with horizontally positioned hearts
Left Axis Deviation
- Causes:
- Left anterior fascicular block
- Left Bundle Branch Block
- Inferior MI
- Left Ventricular Hypertrophy
See Also
Video
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