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.
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Former FBI agent says Nancy Guthrie's Apple Watch holds clues to what happened leading up to her abduction
A former FBI agent says Nancy Guthrie’s Apple Watch data could show possible distress, movement, or a struggle before ...
Unconfirmed media reports say Nancy Guthrie's pacemaker stopped syncing with her Apple devices. Here's what that means.
Dr. Srihari S. Naidu speaks with Parade to answer all our questions about pacemakers.
Add Yahoo as a preferred source to see more of our stories on Google. Electrocardiograms, or ECGs, record the electrical activity of your heart. Randy Faris/The Image Bank via Getty Images Your ...
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