My daughter was born with 2 septal defects (sometimes called murmers). Although in her case it was related to a congenital defect of a valve, the information I learned about them gave me comfort. In most cases they are not life threatening and in many cases continue to grow and form to a proper closure. Essentially this causes a mixing of the blood. The heart has 2 basic sides, 1 for pre-oxygenation (from the body to the lungs-blue blood) and 1 post-oxygenation (from the lungs to the body-red blood). If blood moves from one side to the other it will either not get fully oxygenated or will get re-oxygenated.
In my daughters case they removed the septum (heart chamber wall) all to gether to give here greater oxygenation.
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