Can Hypotension Cause Oliguria?

Oliguria resulting from vasodilatory hypotension should preferably be treated with a vasopressor.

What causes decrease urine output?

Dehydration is the most common cause of decreased urine output. Typically, dehydration occurs when you're ill with diarrhea, vomiting, or another illness, and can't replace the fluids that you're losing. When this happens, your kidneys retain as much fluid as possible.

Can hypotension cause acute renal failure?

If hypotension, even relative, does indeed cause, or increase the risk of, acute renal failure, then maintaining systolic blood pressure at pre-morbid values would become a key target in the prevention of acute renal failure.