Note that the first three account for almost 90% of ECG tracings with LAD. If the QRS is predominantly negative in lead I and positive in lead aVF, then the axis is rightward (right axis deviation).

In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial leads ... is “early,” occurring at or before lead V 3, whereas “clockwise rotation” is a variant ...

There are only a few sinus rhythm QRS complexes available to examine on this ECG ... seen in lead V5). The unusual wide QRS complex, tachycardic rhythm that changes morphology and axis within ...

1 The majority ... Q-waves, left axis deviation and conduction delays and findings suggestive or diagnostic of primary electrical diseases such as long QT syndrome and Wolff-Parkinson-White syndrome.