Acute renal failure in patients with congestive heart failure occurs because of decreased renal blood flow.
[aafp.org]
If a person has congestive heart failure, the heart doesn't pump adequate amounts of blood to the kidneys, resulting in prerenal failure.
[study.com]
insufficiency, arrest (adult) 1,630 1.4 65 14 Other complications of birth, puerperium affecting management of the mother 1,502 1.3 329 15 Congestive heart failure, nonhypertensive
[hcup-us.ahrq.gov]