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:
*Second, there are 4 quadrants where the QRS-vector can point:
**left upper quadrant --> left axis deviation (between -30º and -90º)
**Left upper quadrant --> left axis deviation (between -30º and -90º)
**left lower quadrant --> normal (between -30º and 90º)
**Left lower quadrant --> normal (between -30º and 90º)
**right lower quadrant --> right axis deviation (between 90º and -150º)
**Right lower quadrant --> right axis deviation (between 90º and -150º)
**right upper quadrant --> extreme axis (between -90º and -150º)
**Right upper quadrant --> extreme axis (between -90º and -150º)


''Example'':  
''Example'':  
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