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 is a common congenital heart defect that results in left to right shunting of blood. The amount of blood shunting across a secundum atrial septal defect is dependent upon the size of the defect and the relative compliances of the left and right ventricles during diastole.