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QRS axis

No change in size, 18:20, 22 January 2010
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* 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:
**left Left upper quadrant --> left axis deviation (between -30º and -90º)**left Left lower quadrant --> normal (between -30º and 90º)**right Right lower quadrant --> right axis deviation (between 90º and -150º)**right Right upper quadrant --> extreme axis (between -90º and -150º)


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