Experience with an adjustable pulmonary artery banding device in two cases: Initial success - Midterm failure

Retraining of the left ventricle in congenitally corrected TGA or after Sen ning or Mustard operation is necessary when right-ventricular failure is de veloping and an arterial switch operation is indicated. As these hearts hav e little tolerance of marginal overbanding, a long-term adjustable pulmonar y artery banding device would lower stress and risk of training. Although t he inserted device (Osypka(TM)) allowed convenient intraoperative pressure ratio adjustment, mid-term adjustment failed due to dysfunction of the syst em.