Mitral valve therapy device and system

Set to affect the status of a mitral valve annulus of a heart comprising: a device ring elastic mitral valve (30) configured to deform and be advanced into the coronary sinus (14) and to re-shape the ring (20) of the mitral valve when in the coronary sinus of the heart, characterized in that said assembly further comprises a guide (52) wire configured to be fed into the coronary sinus of the heart, said device mitral valve annulus being configured to be received slidably over the guidewire and comprising opposed ends (34, 36) and a structure (40) in guide wire engaging at least one of the opposite ends; and a guide (54) tube having an inner lumen (55) dimensioned to receive the guide wire and the device.