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.
A heart murmur may be heard by your vet when he or she listens to your cat's heart. A heart murmur is caused by turbulent blood flow within the heart or the large vessels exiting from the heart.This results in an abnormal noise which can be heard by your vet when listening with a stethoscope. heart murmur may be heard by your vet when he or she listens to your cat's heart. A heart murmur is caused by turbulent blood flow within the heart or the large vessels exiting from the heart.