ECG axis: Difference between revisions
(Text replacement - "*Hyperkalemia" to "*Hyperkalemia") |
No edit summary |
||
| Line 10: | Line 10: | ||
==Right Axis Deviation== | ==Right Axis Deviation== | ||
*Causes: | *Causes: | ||
**Right ventricular hypertrophy | **[[Right ventricular hypertrophy]] | ||
**Pulmonary hypertension | **[[Pulmonary hypertension]] & chronic lung disease | ||
**Left posterior fascicular block | **[[COPD]] | ||
**[[Pulmonary embolism]] | |||
**[[Left posterior fascicular block]] | |||
**Lateral MI (from Q-waves in lead I) | **Lateral MI (from Q-waves in lead I) | ||
**Ventricular ectopy (VT) | **Ventricular ectopy (VT) | ||
**[[TCA toxicity]], sodium channel blocker toxicity | |||
**[[Hyperkalemia]] | **[[Hyperkalemia]] | ||
**Lead misplacement | **Lead misplacement | ||
Revision as of 01:42, 23 October 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 & chronic lung disease
- COPD
- Pulmonary embolism
- Left posterior fascicular block
- Lateral MI (from Q-waves in lead I)
- Ventricular ectopy (VT)
- TCA toxicity, sodium channel blocker toxicity
- 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}}