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.
Ventricular Septal Defect Overview. Ventricular septal defect is a hole in the wall between the right and left ventricles of the heart. This abnormality usually develops before birth and is found most often in infants.1  The ventricles are the 2 lower chambers of the heart. The ventricles are the 2 lower chambers of the heart. 2  The wall between them is called the septum. 3  A hole in the septum is called a septal defect. 4  If the hole is located between the upper chambers or atria, it is called an atrial septal defect.