title: Echocardiographic studies in patients with preexcitation syndrome.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004452:Echocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis*