Cardiology: What is the quadrant approach to get the QRS axis?

Question

What is the quadrant approach to get the QRS axis?

H K · Accepted Answer

See Leads I (0 degree) and aVF (+90 degree).
If both positive -->normal
If Lead I negative and aVF positive --> RAD
If both negative -->indeterminate
If Lead I positive and aVF negative --> check Lead II if Positive normal if negative LAD

Cardiology

What is the quadrant approach to get the QRS axis?

See Leads I (0 degree) and aVF (+90 degree). If both positive -->normal If Lead I negative and aVF positive --> RAD If both negative -->indeterminate If Lead I positive and aVF negative --> check Lead II if Positive normal if negative LAD

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