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.
Key points. 1  A ventricular septal defect is a hole between the two lower chambers of the heart. To close the hole, the doctor will place a special device in your child's heart. 2  If the hole is too big to close with the device or in the wrong position, the hole will be closed with surgery.