Devices, systems and methods for delivering and positioning an implantable medical device and for evaluating an acoustic communication link are disclosed. An illustrative system includes a catheter adapted to contain an implantable device with a biosensor and an acoustic transducer configured to transmit an acoustic signal, and an implant assist device in acoustic communication with the implantable device via an acoustic communication link. The implant assist device includes an acoustic transducer adapted to receive the acoustic signal transmitted by the implantable medical device, and control/processing circuitry configured to evaluate a performance of the acoustic link.