As the search for Savannah Guthrie's mother, Nancy, continues, a cardiologist explains how pacemakers work and if they can be used to track a missing person's location.

Your heart has an internal pacemaker called the sinus node. It's a group of cells, located on top of your heart, that sends electrical signals into the heart and controls your heartbeat. Sometimes, ...

Almost all pacemakers use wires to send electrical signals that help your heart beat normally. Most patients will never experience problems or complications from these life-saving devices. But for a ...

Objectives: The CAPTURE study evaluated the accuracy of automated atrial and right ventricular (RV) threshold algorithms. Background: Modern pacemakers include many added features designed to improve ...

In the normal heart, the lower chambers (ventricles) pump at the same time and in sync with the heart's upper chambers (atria). Cardiac resynchronization therapy (CRT), also called biventricular ...

Please provide your email address to receive an email when new articles are posted on . CHICAGO — Patients with pacemakers and implantable cardioverter defibrillators that were not MRI-conditional ...

CHICAGO, IL — Patients with a conventional pacemaker or implanted cardioverter defibrillator (ICD) who need a definitive diagnostic nonthoracic MRI scan—of their brain, lower spine, hip, or knee, for ...

Smaller than a grain of rice, new pacemaker is particularly suited to the small, fragile hearts of newborn babies with congenital heart defects. Tiny pacemaker is paired with a small, soft, flexible ...