Homogeneous Perfusion: Understanding Uniform Blood Flow

Perfusion refers to the amount of blood passing through a tissue or organ at a given time. Because blood carries oxygen to and removes waste products from the body's cells, perfusion is a key indicator of an organ's health, and may provide clues to the cause of health problems.

Homogeneous Perfusion

• Reduced blood flow can result in ischemia.

  A tissue, organ or limb is said to be homogeneously perfused if blood flows uniformly throughout it. Non-homogeneous perfusion is also called "heterogeneous perfusion." Decreased perfusion, or hypoperfusion, of tissue can lead to oxygen deprivation, or ischemia.

Measurement

• MRI can measure perfusion.

  Contrast-enhanced imaging techniques such as magnetic resonance imaging (MRI) or scintography can measure perfusion. Laser doppler perfusion imaging (LDPI) is a method of measuring perfusion that does not require the injection of a contrast agent, but it does not allow visualization of blood flow in deep tissue.

Non-Homogeneous Perfusion

• Non-homogeneous perfusion of the heart may indicate coronary disease.

  In some cases, non-homogeneous perfusion results from normal metabolic changes like increased oxygen demand in working muscles. However, it can also indicate serious medical conditions. Areas of decreased perfusion in the heart, brain or lungs may indicate heart disease, stroke or emphysema, respectively. Areas of increased perfusion may indicate tumor development.