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Almost everyone feels occasional heart palpitations -- a change in the heart's rhythm. Palpitations range from what feels like a skip, flip or bump in the heart's rhythm to a sustained, racing heartbeat. The July issue of Mayo Clinic Health Letter provides an overview of heart palpitations, including when emergency care is needed, what diagnostic tests are used and common triggers...
http://www.k2pedia.com/heart-disease/59384-mayo-clinic-health-letter-when-the-heart-skips-a-beat-worry-or-not-