There are areas in the heart called pacemakers that send electrical signals to the rest of the heart, setting the speed or pace of the heartbeat. These pacemakers speed the heart up during exercise or hard work and slow it down again during rest. If natural pacemakers are injured or fail to do their job, […]
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Flagstaff Business & Online News | Northern Arizona Local Newspaper
Flagstaff Business News is a newspaper and online news source covering Northern Arizona's most influential business leaders and delivered to high income residents and local businesses.
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