This is the most common cause of an unusual,or abnormal, heartbeat in older adults.
VOA: special.2009.09.22
Two years after her wedding and still not pregnant, the 26-year-old visited a gynecologist, who diagnosed her with polycystic ovary syndrome, an endocrine disorder that can cause women to stop ovulating, gain unusual weight, develop irregular periods or skin problems and grow abnormal facial and body hair.