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.
Atrial septal defect (ASD) Atrial septal defect (ASD) is a heart defect that is present at birth (congenital). As a baby develops in the womb, a wall (septum) forms that divides the upper chamber into a left and right atrium. An abnormal formation of this wall can result in a defect that remains after birth. This is called an atrial septal defect, or ASD.