Intermittent complete closure of the arterial duct

intermittent functional closure of a patent duct has been reported both cli nically and echocardiographically. We describe the case of a 6-year-old wit h intermittent complete closure of a parent duct occurring during attempted transcatheter closure. Recurrence of clinical and echocardiographic signs prompted restudy. A patent duct of moderate size was demonstrated and succe ssfully occluded by coil embolization. The interventional aspects of this u nusual condition are discussed.