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.
Septal Defects (âholes in the heartâ) A septal defect (see illustration) can occur between the two ventricles (pumping chambers) of the heart, called a ventricular septal defect, or between the two atria (filling chambers), called an atrial septal defect.