cardiolab logocardiolab
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Improved

The axis page turns only the QRS, and shows the leads as an ECG prints them

Before

The whole beat turned with the axis, so the P and T moved with the QRS, and the six leads were laid out only in Cabrera order.

After

Only the QRS turns; the P and T stay where a normal heart puts them. The leads default to the standard printed layout with Cabrera as an option, each axis deviation lists its causes, and the quadrant method opens first, as most courses teach it.