Retraction guidewires (20) are disclosed, including retraction guidewires configured to transition from an elongate configuration for delivery to a treatment site through an organ wall to a deployed configuration for retraction of the organ wall, for example. The deployed configuration includes a stem portion (30) and a dome portion (32) having a distal end (42) and a proximal end (40), the stem portion extending proximally from the distal end of the dome portion.
