LONDON (AP) — A tiny, wireless pacemaker could offer some heart patients a surgery-free alternative to the traditional devices, a new study says. Unlike traditional pacemakers — which need a generator and wires and are implanted via surgery — the new pacemaker is a wireless tiny tube that can be attached to the right side of the heart using a catheter inserted through the leg. The miniature pacemaker is already approved in Europe and the new study will likely be submitted to the U.S.