Unlike total range, the interquartile range has a breakdown point of 50%, and is thus often preferred to the total range. The IQR is used to build box plots, simple graphical representations of a probability distribution.igure 3. Box-and-whisker plot with four close and one far away extreme values, defined as outliers above Q3 + 1.5(IQR) and Q3 + 3(IQR), respectively. The interquartile range is often used to find outliers in data. Outliers are observations that fall below Q1 - 1.5(IQR) or above Q3 + 1.5(IQR).
Medical Definition of Heart murmur. Heart murmur: An unusual, 'whooshing' heart sound that may be innocent or may reflect disease or malformation. A heart murmur is created by blood flow through a heart valve, by blood flow through a narrowed chamber, or by an unusual connection between the chambers, as seen with congenital heart disease.
Complicated: A 'heart murmur means that one can hear blood flow with a stethoscope. Very nonspecific term. A hole in the heart is a connection between the circulation that supplies the lungs (right heart) and the circulation that supplies the body (left heart). There are various types of holes (defects). All of the holes/defects have the potential to cause a murmur.