Does wolf parkinson white syndrome cause fluid to build up in my daughter's legs?

No: Wolff-parkinson-white (WPW) syndrome describes a condition where there are ECG abnormalities and a predisposition to a rapid heart rate known as supraventricular tachycardia (svt). In almost all patients, the heart function is normal. Very rarely a weak heart muscle is present in patients with WPW and they may have symptoms of heart failure. Even in this setting isolated leg swelling is not seen.

WPW and Edema: By itself no... There has to be a different cause for that (elevated pulmonary pressure etc...) see you family doctor or cardiologist.