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According
to the American Heart Association, one out of every four adults
over the age of 40 could develop atrial fibrillation, which is defined
as an irregular heartbeat.
Approximately 2.2 million people living in the United States have
been diagnosed with atrial fibrillation. The condition accounts
for almost 15 percent to 20 percent of stroke cases and is considered
the most common of heart rhythm disorders.
It could also lead to a number of negative health repercussions
such as an increased risk of stroke, death and an overall reduction
in the quality of life.
Atrial fibrillation causes a quivering in the two upper chambers
of the heart as opposed to having it beat effectively. When this
happens, blood is unable to pump completely out of them, which could
then lead to clotting. The formation of blood clots could then travel
from the heart to the brain, which results in an ischemic stroke.
Atrial fibrillation is often a "silent" condition, meaning
that some patients do not detect any changes with their heart rhythm
and therefore are walking around undiagnosed, oblivious to the fact
they have the condition.
A Study of Medical Histories and Electrocardiograms
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Participants included 3,999 men and 4,726 women who were studied
between the years of 1968-1999
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Throughout the course of the study, 936 of the participants
developed atrial fibrillation and 2,621 died without prior history
of atrial fibrillation
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The researchers concluded that once a person turned 40 years
of age, their average lifetime risk for developing atrial fibrillation
was 26 percent for men and 23 percent for women
To put these findings into perspective, researchers took the lifetime
risk for breast cancer for a 70-year-old woman, which is one in
14, and compared it to that same person's remaining lifetime
risk of atrial fibrillation, one in four.
One expert stressed the importance of looking into taking a more
preventative approach to atrial fibrillation and finding some more
effective forms of therapy. They also recommended that people learn
how to take their own pulse as a way to monitor whether or not they
have developed the condition.
Circulation
August 16, 2004;110
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