title: Clinical and electrophysiologic observations in patients with concealed accessory atrioventricular bypass tracts.
mesh_terms: D000328:Adult; D000368:Aged; D001281:Atrial Fibrillation / Q000209:etiology; D001282:Atrial Flutter / Q000209:etiology; D002037:Bundle-Branch Block / Q000209:etiology; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D011296:Prenatal Diagnosis; D013614:Tachycardia, Paroxysmal / Q000209:etiology; D014927:Wolff-Parkinson-White Syndrome / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*