Stenosis of the superior caval canal after mustard and senning procedures:Treatment by dilatation and stenting: Two case reports.

The authors report two cases of stenosis of the superior caval canal after Mustard and Senning procedures for transposition of the great arteries in p atients paced for atrial arrhythmia. During cardiac catheterisation, it was possible to treat the stenosis by pe rforation in one case and by balloon dilatation in the second, followed by the implantation of two stents to reestablish vascular patency. In one pati ent, two pacing catheters were implanted by an endovascular approach withou t complications three months after stenting; in the other case, epicardial pacing was required because the patient's condition could not wait for endo thelialisation of the stent before implanting the pacing catheters. This technique of revascularisation may also be used in children with Venou s stenosis after implantation of endocavitary pacing catheters, in which th e pacing system has to be changed.