QRS axis: Difference between revisions
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* First, when a positive depolarization wave moves towards a positive electrode, a positive, upwards deflection is registered on the ECG. | * First, when a positive depolarization wave moves towards a positive electrode, a positive, upwards deflection is registered on the ECG. | ||
*Second, there are 4 quadrants where the QRS-vector can point to: | *Second, there are 4 quadrants where the QRS-vector can point to: | ||
**left upper quadrant --> left axis deviation (between - | **left upper quadrant --> left axis deviation (between -30ú and -90ú) | ||
**left lower quadrant --> normal (between - | **left lower quadrant --> normal (between -30ú and 90ú) | ||
**right below and right --> right axis deviation (between | **right below and right --> right axis deviation (between 90ú and -150ú) | ||
**right upper quadrant --> extreme axis (between - | **right upper quadrant --> extreme axis (between -90ú and -150ú) | ||
''Example'': | ''Example'': | ||