Ordinarily, a pacemaker is surgically implanted below the collarbone, where it sits in a sizable pocket under the skin. Electrical leads run from it to the heart, allowing it to monitor the rhythm of the heartbeat, and deliver electrical pulses to adjust that rhythm as needed. Now, however, Minnesota-based St. Jude Medical has announced upcoming availability of "the world’s first and only commercially available leadless pacemaker." Known as the Nanostim, it's reportedly less than 10 percent the size of a regular pacemaker, and is inserted directly into the heart via a minimally-invasive procedure.
Read the full article: Self-contained mini pacemaker is implanted right into the heart