![Age- and sex-specific reference intervals for blood urea nitrogen in Chinese general population | Scientific Reports Age- and sex-specific reference intervals for blood urea nitrogen in Chinese general population | Scientific Reports](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41598-021-89565-x/MediaObjects/41598_2021_89565_Fig1_HTML.png)
Age- and sex-specific reference intervals for blood urea nitrogen in Chinese general population | Scientific Reports
![Persistent high blood urea nitrogen level is associated with increased risk of cardiovascular events in patients with acute heart failure - Jujo - 2017 - ESC Heart Failure - Wiley Online Library Persistent high blood urea nitrogen level is associated with increased risk of cardiovascular events in patients with acute heart failure - Jujo - 2017 - ESC Heart Failure - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/93eba77d-acfb-4fd5-af11-a5650022bf49/ehf212188-fig-0001-m.jpg)
Persistent high blood urea nitrogen level is associated with increased risk of cardiovascular events in patients with acute heart failure - Jujo - 2017 - ESC Heart Failure - Wiley Online Library
![Rev Electron Biomed / Electron J Biomed 2004;2:65-68. Musso et al. ACUTE RENAL FAILURE WITH NORMAL PLASMA UREA LEVELS Rev Electron Biomed / Electron J Biomed 2004;2:65-68. Musso et al. ACUTE RENAL FAILURE WITH NORMAL PLASMA UREA LEVELS](https://biomed.uninet.edu/2004/n2/musso/table1.gif)