[Dilatation of supravalvular pulmonary stenosis in transesophageal echocardiographic monitoring--the kissing-balloon technic].

A successful dilatation of a supravalvular pulmonary stenosis after banding operation is described in a 19-year-old male. The dilatation was performed during transesophageal echocardiographic monitoring. Dilatation with a 15-mm and a 19-mm valvuloplasty catheter was not successful. Using the "kissing-balloon" technique with a 15 and 19 mm balloon together, the pressure gradient could be reduced from 59 mm Hg to 10 mm Hg (mean 41 and 8 mm Hg). Pulmonary artery diameter increased from 17 to 24 mm without intima damage or dissection. Thus pulmonary artery stenosis caused by banding operation can be dilated successfully. Monitoring during the procedure quickly demonstrates the changes in the dilated vessel. Angiography 6 months later showed slight restenosis of the dilated vessel with a maximum pressure gradient of 27 mm Hg (mean 17).