Credit: John A. Rogers/Northwestern University/Cover Images Engineers at Northwestern University in Illinois have developed an ultra-small pacemaker that can be non-invasively injected into the body ...

Defibrillators and pacemakers help the heart maintain a regular rhythm. Defibrillators deliver a shock if the heart goes into arrhythmia. Pacemakers use electrical impulses to keep the heart from ...

A healthy heart beats 60 to 100 beats per minute, but when that rate slows down, patients require a pacemaker. Experts say traditional versions are bulky and need two ...