A new injectable, temporary pacemaker could help correct a heart arrhythmia in an emergency. This nanoparticle gel can regulate the heart’s electrical signals for up to five days before ...

Efimov’s team is also working on a syringe-like device that will safely inject the pacemaker into the heart for emergency pacing, like in the wake of a heart attack.

Tan and other members of the pediatric heart team filed for emergency approval to use an adapted version of the device that was suitable for babies. It's the smallest pacemaker in the world.

The man’s hearts restarted with a normal rhythm, and when he was well enough for surgery, his pacemaker was switched out for a kind of implantable defibrillator device called a cardioverter.