Marie Suszynski everydayhealth.com Most people take their regular, steady heartbeat for granted. Even those with a somewhat irregular beat often don't worry much. But an arrhythmia, or irregular heartbeat, can lead to a life-threatening emergency. Just ask Heather Blum. Blum, a Pittsburgh resident, had experienced a rapid heartbeat occasionally. In the fall of 2012 though, she started feeling tired and sick, and the palpitations came more frequently. “My heart would race as if I was nervous or when I wasn’t doing anything to cause it to go up,” she said. to read more: everydayhealth.com
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