Your heart’s job is to keep your pulse steady to pump blood throughout your body. Sometimes your heart rate is slower when you’re relaxing, and sometimes it’s faster when you’re exercising or stressed ...

Last summer, Northwestern University researchers introduced the first-ever transient pacemaker — a fully implantable, wireless device that harmlessly dissolves in the body after it’s no longer needed.

The tiny pacemaker sits next to a single grain of rice on a fingertip. The device is so small that it can be non-invasively injected into the body via a syringe. Northwestern University engineers have ...