The purpose of this prospective observational study is to characterize the clinical profile of patients with WPW syndrome and patients with asymptomatic WPW pattern on ECG in different African countries and how these patients are managed across Africa Participants would include many different ethnicities at centers where the number of cardiac patients treated is high. All patients attending outpatient cardiology clinics or referred to Cath Lab for electrophysiological studies who are diagnosed to have a Wolf-Parkinson white pattern on the ECG are either symptomatic or asymptomatic. All patients fulfilling the eligibility criteria will be approached by the research team and asked if they wish to take part in the study. The exclusion criteria will be any participant who does not consent to the study. A baseline cardiovascular history (including hypertension, diabetes, heart failure, coronary artery disease, hyperlipidemia, smoking, valve disease, and arrhythmia) will be recorded. A detailed history will be taken about symptoms, medications and presence of family history of similar cases or sudden cardiac death 12-lead ECG will be recorded to confirm the presence of pre-excitation and determine the localization of the accessory pathway using the modified Aruda algorithm. This will be done by two of the research teams in each center. Then other data from the electrophysiological study and ablation will be filled in by the research team from the data systems of each center.