The atria can undergo dilation in response to chronic volume overload. Conditions that increase volume overload are... mitral valve regurgitation, the volume and pressure of the left atrium are greatly increased. The left atrium responds by undergoing chronic dilation, which enables it to accommodate the increased volume without as large an increase in pressure because of its increased compliance.
Dilation of the atria are results of cardiac remodeling. Under some conditions ( exercise training) remodeling is beneficial; however, under other conditions ( heart failure) this remodeling is detrimental because it increases the oxygen demand of the heart and decreases mechanical efficiency. Certain drugs, such as beta-blockers, ACE Inhibitors, and angiotensin receptor blockers have been shown to prevent or partially reverse remodeling under pathologic conditions.
Atrial Fibrillation/Flutter can also cause romodeling in the atria.
Other than your current diagnosis, do you have any other cardiac history?
Copyright 1994-2016 MedHelp International. All rights reserved.
MedHelp is a division of Aptus Health.
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.