In one embodiment, the present invention includes a connector ring assembly to attach a VAD to a heart. The assembly includes a clamp which can rotate completely about the annular wall in a first state and is fixed relative to the annular wall in a second state. The clamp transitions from the first state to the second state via an actuator. The actuator can be configured with an axis of rotation generally parallel to the opening of the annular wall, thereby allowing manipulation of the actuator through the same surgical accessway as that used to implant the connector ring assembly. At least one embodiment provides a connector flange separately from an annular wall to provide greater access to the connector flange during implantation. The annular wall and clamp are attached to the connector flange after the flange is fixed to the heart.