Doctors urge caution over tiny new pacemakers

A tiny, wireless pacemaker could offer some heart patients a surgery-free alternative to the traditional devices, a new study says.

Some doctors, however, say there are lingering safety questions and warned patients not to rush to get the new technology.

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.