[Emergency epicardial dissection of the accessory pathway in a patient with atrioventricular nodal reentrant tachycardia].

Diagnostic and therapeutic problems in 14 year old patient with concealed WPW syndrome were presented. Paroxysms of atrio-ventricular reentrant tachycardia 180-220/min were frequently recurring, usually with normal QRS pattern. Tachycardias often had to be terminated by intravenous administration of antiarrhythmic drugs.