Atrial fibrillation (AFib), an abnormal heart rhythm with symptoms often described as "butterflies" in the chest, is the most common type of heart arrhythmia, affecting an estimated 2.7-6.1 million people in the United States, according to the CDC.
Posted at 11:57 AM, Sep 18, 2018
and last updated 2018-09-18 11:57:05-04
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