An Osborne wave can also occur from hypercalcemia. Hypercalcemia shortens the QT interval. Dextrocardia shows negative QRS complex in lead I with negative P and T wave in this lead. There is low ...

The ECG findings of dextrocardia include a predominantly negative P wave (when sinus rhythm is present), negative QRS complex, and negative T wave in lead I. This results in a rightward QRS axis.

For ATs originating from high CT, superior PVs, and RAA (Fig. 1A), P waves were positive in inferior leads and negative in lead aVR. For ATs arising from CS ostium and inferior TA (Fig.