What is the normal direction of the QRS complex axis in the frontal plane?
The QRS complex axis is normally directed towards the left and slightly...
What is the normal direction of the QRS complex axis in the frontal plane?
The QRS complex axis is normally directed towards the left and slightly upwards or downwards in the region between -30° and +90°. The QRS complex axis is normally directed towards the right and slightly upwards or downwards in the region between +90° and ±180°. The QRS complex axis is normally directed towards the left and slightly upwards or downwards in the region between -30° and -120°. The QRS complex axis is normally directed towards the right and slightly upwards or downwards in the region between -90° and ±180°.
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