Transcatheter Devices And Methods For Pulmonary Flow Reduction In Patients With Congenital Heart Disease

A transcatheter pulmonary flow reduction device for adjusting blood flow through a pulmonary artery of a patient, comprising:

• a flexible device frame having an annular waist region in axial alignment between an annular proximal frame end region and an annular distal frame end region and being in an implantation state for facilitating insertion into the pulmonary artery of the patient, the annular proximal frame end region, the annular waist region and the annular distal frame end region each defining an external periphery and cooperating to define an internal channel extending from the annular proximal frame end region to the annular distal frame end region,
• wherein said device frame is configured to be deployed within the pulmonary artery and radially expanded from the implantation state to a first stable expanded state with the external periphery of the annular proximal frame end region and the external periphery of the annular distal frame end region each being adapted to engage the pulmonary artery and with the internal channel of the annular waist region having an internal cross-section being adapted to radially expand to a predetermined first cross-section that is less than a cross-section of the pulmonary artery for restricting the blood flow through the pulmonary artery via said device frame, and
• wherein said deployed device frame is configured to be subsequently radially re-expanded from the first stable expanded state to a second stable expanded state with the internal cross-section of the annular waist region being further expanded to a predetermined second cross-section that is less than the cross-section of the pulmonary artery and that is greater than the predetermined first cross-section for adjusting the restricted blood flow through the pulmonary artery via said device frame.