The present teachings provide devices and methods of reshaping the right heart and reducing tricuspid valve regurgitation. Specifically, one aspect of the present teachings provides an inflatable device to be deployed in the space between the sternum and the right heart. An injectable medium is injected to the cavity of the device. Once the device is filled, the device is detached from the delivery system, and released inside the body. The inflated device exerts pressure to the right heart, changes the shape of the tricuspid annulus, and allows a better coaptation of the tricuspid leaflets.