A medical apparatus 40 for remodeling a mitral valve annulus adjacent to the coronary sinus, comprises an elongate body 66 having a proximal end 42 and a distal end 44, the elongate body being adjustable between a first configuration for transluminal delivery into at least a portion of the coronary sinus and a second configuration for remodeling the mitral valve annulus from within the coronary sinus an electrical conductor attached to the elongate body and a cardiac rhythm management device in electrical communication with the electrical conductor.
