ECG axis: Difference between revisions
(Text replacement - "HTN" to "hypertension") |
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==Left Axis Deviation== | ==Left Axis Deviation== | ||
*Causes: | *Causes: | ||
**Left anterior fascicular block | **[[Left anterior fascicular block]] | ||
**Left Bundle Branch Block | **[[Left Bundle Branch Block]] | ||
**Inferior MI | **Inferior MI (from Qs) | ||
**Left Ventricular Hypertrophy | **[[Left Ventricular Hypertrophy]] | ||
**Pacer | |||
**[[WPW]] | |||
**[[Hyperkalemia]] | |||
**Normal variant | |||
==See Also== | ==See Also== | ||
Revision as of 07:16, 6 August 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 (from Qs)
- Left Ventricular Hypertrophy
- Pacer
- WPW
- Hyperkalemia
- Normal variant
See Also
Video
{{#widget:YouTube|id=grFic4Gb0zA}}