Final answer:
Impaired tissue perfusion refers to reduced blood flow to a specific tissue or organ. It can lead to cell death and impair the function of vital organs like the brain or heart. Vessel narrowing is a common cause of impaired tissue perfusion.
Step-by-step explanation:
Impaired tissue perfusion refers to reduced blood flow to a specific tissue or organ. It can occur due to vessel narrowing, which leads to ischemia, a decrease in oxygen supply to the tissues. Impaired tissue perfusion can have severe consequences, such as cell death and impairment of brain or heart function. For example, hypoxia in cardiac muscle or brain tissue can result in cell death and significant damage to the heart or brain.