A valve such as an esophageal valve (1) has a normally closed configuration in which the valve (1) is closed and an open configuration in which the valve (1) is opened for flow through the valve (1). A support (102) for the valve (1) is adapted for mounting to a pre deployed luminal prosthesis (140) intermediate a proximal end and a distal end of the predeployed luminal prosthesis (140). 155 +*200 Fig. 55 Fig. 54
