ECG Electrical Axis Classification
If the QRS complex is isoelectric in a lead, then the ventricular axis is —— to that lead
[A] 0 degrees
[B] 60 degrees
[C] 90 degrees
[D] 180 degrees
ECG Electrical Axis Classification
If the QRS complex is isoelectric in a lead, then the ventricular axis is perpendicular (90 degrees) to that lead
Electrical Axis Classification
What are the five main electrical axis classifications?
- Normal axis
- Left axis deviation (LAD)
- Right axis deviation (RAD)
- Extreme axis deviation, and
- Indeterminate axis
What is the Normal QRS Axis in ECG?
Normal QRS axis
- At birth – between +30 degrees and +190 degrees.
- Ages of 8 to 16 – axis moves leftward with normal lying between 0 degrees to +120 degrees.
- The normal adult QRS axis is between -30 degrees and +90 degrees, which is directed downward and to the left.
- This adult range is sometimes extended from -30 degrees to +100 degrees.
Electrical Axis (from TheEKGGuy.com with permission). Contributed by Anthony H. Kashou, www.theekgguy.com. Copyright © 2023, StatPearls Publishing LLC.
