The prevalence of WPW<unk>  is approximately 100-300 per 100000 individuals worldwide. The incidence of tachyarrhythmia was estimated to be 1000 cases per 100000 individuals in the year in patients with WPW  pattern. The incidence of sudden cardiac death in patients with<unk> -Parkinson-White<unk>  was estimated to be 70-450 per 100000 patient-years. WPW<unk>  is more commonly observed among young patients. In one study WPW<unk>  was observed in 7% of individuals over 60-year-old. Men are more commonly affected with WPW<unk>  than women. The men to women ratio is approximately 2 to 1. There is no racial predilection for WPW<unk> .
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