ECG axis: Difference between revisions

Revision as of 12:54, 28 March 2016

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

Causes:
- Left anterior fascicular block
- Left Bundle Branch Block
- Inferior MI
- Left Ventricular Hypertrophy

Authors:

@@ Line 1: / Line 1: @@
-*If up in leads 1 and AVF then normal axis
 [[File:Axes.png|thumb|ECG Axis]]
 [[File:Limb_leads.png|thumb|Limb and augmented leads]]
 [[File:Precordial_leads.png|thumb|Precordial leads]]
+==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 HTN - 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
-;Causes:
+==Left Axis Deviation==
-*Right ventricular hypertrophy
+*Causes:
-*Pulmonary HTN - Acute (PE) & chronic lung disease (COPD)
+**Left anterior fascicular block
-*Left posterior fascicular block
+**Left Bundle Branch Block
-*Lateral MI (from Q-waves in lead I)
+**Inferior MI
-*Ventricular ectopy (VT)
+**Left Ventricular Hypertrophy
-*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==
 *[[ECG (Main)]]
@@ Line 27: / Line 32: @@
 ==Video==
 {{#widget:YouTube|id=grFic4Gb0zA}}
+==References==
+<references/>
 [[Category:Cardiology]]