Zero on the Celsius scale (0 Â°C) is now defined as the equivalent to 273.15 K, with a temperature difference of 1 deg C equivalent to a difference of 1 K, meaning the unit size in each scale is the same.
Atrial septal defect (ASD) is a congenital heart defect in which blood flows between the atria (upper chambers) of the heart.Normally, the atria are separated by a dividing wall, the interatrial septum.trial septal defect (ASD) is a congenital heart defect in which blood flows between the atria (upper chambers) of the heart.
An atrial septal defect is a birth defect of the heart in which there is a hole in the wall (septum) that divides the upper chambers of the heart (atria).A hole can vary in size and may close on its own or may require surgery. An atrial septal defect is one type of congenital heart defect.Congenital means present at birth. As a baby develops during pregnancy, there are normally several openings in the wall dividing the upper chambers of the heart (atria).These usually close during pregnancy or shortly after birth.n atrial septal defect is one type of congenital heart defect. Congenital means present at birth. As a baby develops during pregnancy, there are normally several openings in the wall dividing the upper chambers of the heart (atria). These usually close during pregnancy or shortly after birth.