My mom suffered from what is known as atrial flutter. Atrial flutter is a condition where the heart gets out of rhythm. Because the heart is out of rhythm it can cause the heart to beat really fast or feel like it's skipping beats. My mom underwent a bunch of tests and she's fine. You can find more information here: http://www.emedicinehealth.com/atrial_flutter/article_em.htm#Atrial%20Flutter%20Overview
