the term WPW alternans is used. The accessory pathway that is exists is refractory on an alternating basis creating this appearance. This is a relatively rare ECG finding.

The Lown-Ganong-Levine (LGL) syndrome occurs when an accessory ... interval on the ECG. The main distinguishing feature between LGL and WPW syndromes is that the accessory pathway in LGL syndrome ...

A 19-year-old male was referred for elective radiofrequency catheter ablation of asymptomatic Wolff-Parkinson-White (WPW ... presence of a right-sided anteroseptal accessory pathway (Fig.