In at least one embodiment, a system and method for implanting an implantable medical device within a patient may include an IMD including a housing and an attachment member, and a delivery catheter including a tethering snare that is configured to be selectively extended out of the delivery catheter and retracted into the delivery catheter. The displaceable yarn tensioning elements and the electrical coil are disposed on a common pivot lever. When the internal gear 51 is rotated along with rotation of the adjustment dial 50, the rotation shaft 55 is rotated via the external gear 52.