“Inoue-Balloon” catheter is indicated for PTMC (Percutaneous Transvenous Mitral Commissurotomy) in patients with mitral stenosis. The volume controlled hour-glass shape of the balloon assures proper positioning at the stenosis, prevents migration of the catheter and provides optimal dilation. The unique balloon construction exhibits dynamic inflation properties sufficient for valvular expansion. Rapid inflation/deflation cycle (5sec.) quickly returns valve to normal function.