Final answer:
Prerenal ARF refers to acute renal failure caused by decreased blood perfusion to the kidneys. It can occur due to conditions like hypovolemia, shock, and dehydration.
Step-by-step explanation:
Acute renal failure due to decreased blood perfusion to the kidneys is called Prerenal ARF. This type of renal failure occurs when there is a problem with blood supply to the kidneys, leading to decreased perfusion and subsequent kidney dysfunction.
For example, conditions such as hypovolemia (decreased blood volume), shock, dehydration, and excessive diuretic use can all cause prerenal ARF.