One part of the investigation into the disappearance of "Today" show host Savannah Guthrie's mother focuses on the missing woman's implanted medical device.

Nancy Guthrie’s pacemaker reportedly stopped syncing with her Apple devices predawn Sunday morning – as the Arizona sheriff leading the missing person case called a surprise press conference for late Tuesday morning.

Pima County investigators are using Apple Watch and iPhone data — specifically an interrupted pacemaker sync — to establish a precise timeline in the abduction of Nancy Guthrie from her Tucson home.

Pediatric cardiologists have implanted a dual chamber leadless pacemaker in a child. UC Davis Director of Pediatric Electrophysiology Dan Cortez has set another world record: He is the first to implant a dual chamber leadless pacemaker in a child.

Please provide your email address to receive an email when new articles are posted on . The world’s first dual-chamber leadless pacing system was named a top invention of 2023. The first implantation procedures since FDA approval in July have been ...

Biotronik designed its leadless pacing system to use atrial electrical far-field sensing. The company says it would represent the world’s first intracardiac pacemaker to do so. It enables atrioventricular (AV)-synchronous pacing at rest and during exercise with a single cardiovascular implantable electronic device (CIED).

Two types of implantable cardioverter defibrillators can reduce the risk of sudden cardiac death with HCM. Pacemakers and implantable loop recorders also may be options.

Dr. Hunter Champion answers the question: 'What Is A Biventricular Pacemaker?' — -- Question: What is a biventricular pacemaker or cardiac resynchronization therapy (also called a CRT device), how is it implanted for heart failure patients, and who is ...