There is a hole between the right and left atrium and some blood is passing from the left atrium to the right atrium. This a congenital defect as the hole usually closes after birth, the passing of blood left to right and the small size is not considered serious. There probably isn't any symptoms associated with the defect, but if it enlarges there may be shortness of breath with exertion.
If there develops a symptoms, the success rate with intervention for successful closure is good for atrial septal defect size of 15 mm or less.
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.