ECG axis: Difference between revisions

Latest revision as of 22:13, 27 March 2024

ECG Axis

Limb and augmented leads

Precordial leads

-30°→90°
Dominant QRS direction (positive or negative) can be used to approximate axis
- Normal axis if positive QRS in leads I and aVF

Authors:

@@ Line 10: / Line 10: @@
 ==Right Axis Deviation==
 *Causes:
-**Right ventricular hypertrophy
+**Usually accompanied by tall R wave in V1
-**Pulmonary HTN - Acute (PE) & chronic lung disease (COPD)
+***[[Right ventricular hypertrophy]]
-**Left posterior fascicular block
+***[[Pulmonary hypertension]] & chronic lung disease
+**[[COPD]]
+**[[Pulmonary embolism]]
+**[[Left posterior fascicular block]]
 **Lateral MI (from Q-waves in lead I)
 **Ventricular ectopy (VT)
-**Hyperkalemia
+**[[TCA toxicity]], sodium channel blocker toxicity
+**[[Hyperkalemia]]
 **Lead misplacement
 **Dextrocardia
@@ Line 22: / Line 26: @@
 ==Left Axis Deviation==
 *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==
 *[[ECG (Main)]]
-==Video==
-{{#widget:YouTube|id=grFic4Gb0zA}}
 ==External Links==
-* [http://ddxof.com/ecg-guide/ DDxOf: ECG Guide]
+*[http://ddxof.com/ecg-guide/ DDxOf: ECG Guide]
 ==References==