Print Page  |  Contact Us  |  Sign In  |  Register
Atrial Fibrillation
Share |
Atrial fibrillation (AF) is the most common type of serious arrhythmia. It’s a very fast and irregular contraction of the atria. It occurs when the heart’s electrical signal begins in a different part of the atrium than the sinoatrial (SA) node or when the signal is conducted abnormally. When this happens, the electrical signal doesn’t travel through the normal pathways in the atria, but instead may spread throughout the atria in a fast and disorganized manner. This causes the walls of the atria to quiver very fast (fibrillate) instead of beating normally. As a result, the atria aren’t able to pump blood into the ventricles the way they should. It is not usually life threatening, although it can be dangerous when it causes the ventricles to beat very fast. 

The two most serious complications of chronic (long-term) atrial fibrillation are stroke and heart failure. Stroke can happen when a blood clot travels to an artery in the brain, blocking off blood flow. In AF, blood clots can form in the atria because some of the blood "pools” in the fibrillating atria instead of flowing into the ventricles. If a piece of a blood clot in the left atrium breaks off, it can travel to the brain, causing a stroke. People with AF are often treated with blood-thinning medicines to reduce the chances of developing blood clots. 

Heart failure is when the heart can’t pump enough blood to meet the needs of the body. AF can cause heart failure when the ventricles beat too fast and don’t have enough time to fill with blood to pump out to the body. Heart failure causes tiredness, leg swelling, and shortness of breath. 

AF and other supraventricular arrhythmias can occur for no apparent reason. Most of the time, however, they are caused by an underlying condition that damages the heart muscle and its ability to conduct electrical impulses. These conditions include high blood pressure (hypertension), coronary artery disease, heart failure, or rheumatic heart disease. Other conditions also can lead to AF, including overactive thyroid gland (too much thyroid hormone produced) and heavy alcohol use. AF also becomes more common as people get older. 
 
 
Community Search
Sign In


Forgot your password?

Haven't registered yet?

Calendar

4/28/2014
WomenHeart of Miami en Español Support Network

4/28/2014
Copy of WomenHeart of Huntington Support Network Meeting

5/5/2014
WomenHeart of Fox Valley-PM Support Network Meeting

5/5/2014
WomenHeart of Overland Park Support Network Meeting

5/6/2014
WomenHeart of Fox Valley-AM Support Network Meeting

Latest News
Online Surveys
 
WomenHeart: The National Coalition for Women with Heart Disease is a nonprofit, 501(c)(3) patient advocacy organization with thousands of members nationwide, including women heart patients and their families, health care providers, advocates and consumers committed to helping women live longer, healthier lives. WomenHeart supports, educates and advocates on behalf of the 42 million American women living with or at risk of heart disease. Our programs are made possible by donations, grants and corporate partnerships.

2013 Copyright - WomenHeart: The National Coalition for Women with Heart Disease
WomenHeart: The National Coalition for Women with Heart Disease is a founding partner of The Heart Truth Red Dress campaign. The Heart Truth and Red Dress are trademarks of HHS.